There may be similarities between blood and DNA, but in practice, Ukraine and Russia are competitors, and Russia and Poland are feuds.
Russia's founding origins are the "Rus' Principalities" of the 9th century, that is, the Kievan Rus' founded in Kiev, the capital of Ukraine, and they belong to the East Slavs.
The ruler of Kievan Rus' was Grand Duke Vladimir, a hero of the first degree of Qin Shi Huang in Russian and Ukrainian culture, the title of the Ruler of Rus' and the favorite of their names, such as Vladimir Lenin and Vladimir Putin.
The Rus' of Kievan Rus' territory were divided into three parts in the long course of history, Ukraine, Belarus and Russia, and the royal power of Grand Duke Vladimir also went to the Muscovite Principality.
Because of the homogeneity of ancestral cultures, they actually have a desire for assimilation with each other, somewhat similar to the feelings of prussians, Austrians, etc. for the Holy Roman Empire and the German nation.
Poles were West Slavs, and their ethnic division was separated from that of East Slavs very early on, hence the definition of "ancient Poles".
The ancient Poles established the Duchy of Poland in the 9th and 10th centuries in the Varta River Valley, the State of Vistula in the upper reaches of the Vistau River, and many small forces and city-states, all of which were the ancestors of the Poles.
In other words, it is not feasible to expect Poles to climb the ladder with russians, who at best climb with Ukrainians and Belarus.
Belarus put aside for the time being, and the hatred between Russia and Ukraine is greater than blood relations.
Kiev, the capital of Ukraine, was once a principality of the Rus' and Vladimir Grand Dukes, but the arrival of the Mongols changed a lot of things.
The Mongol conquests led to the fall of the entire Rus' lands, and they conquered the Rus' at the beginning, then the Poles, all the way to Budapest, Hungary. The Golden Horde became the ruler of the Rus' who killed many nobles in Kiev and then gave the title of Grand Duke of Vladimir to Ivan I, Grand Duke of Moscow, who was under control.
The Muscovites used this time to develop desperately and expand their power, eventually driving out the Mongols after 240 years of rule, while also establishing a powerful state, establishing Tsarist Russia and beginning a new journey of Russians.
It was also during the reign of the Mongols that the Ukrainians began to develop their own culture and customs, which gradually divided them from the Moscow side and became a mono-ethnic group; the same was true of Belarus.
The Poles were also developing here, and they only established a unified Kingdom of Poland in the 11th century, and then began to fight and win the war with Shinra. The ancient Poles were more ferocious than the Rus', fighting the Teutonic Knights, the German peoples, and the Hungarians and Mongols.
But the Poles did not live comfortably, and Bolesław I established the state, but Bolesław III divided the country among his 4 sons. Behind the war turmoil of the Poles was the constant aggression and division of other peoples.
When the Mongols' western expedition hit Poland, the Poles also fought tenaciously, and the result was, of course, tragic, polish knights suffered heavy casualties in front of the Mongols, almost all of the army was destroyed, but their efforts did play a role, the Mongols bypassed this group of difficult heavy cavalry, so that the Poles became the "European shield".
In this way, the Poles barely managed to preserve the country, but the Rus' on the other side fell under the rule of the Golden Horde.
More than 40 years later, the ruler of the Golden Horde, Nahai Khan, led the Mongols to make a comeback, and this time their servants included a large number of Rus' people.
But this time the Poles also played the role of a European shield, and together with the Hungarians, they vigorously fought against the Mongol invasion. Since then, the Mongols have not taken a deeper grip on Europe, and they have returned to Asia instead.
But the struggle between Poland and the Rus' never ended, and they later united with the Lithuanians, who were also at odds with the Rus', and fused with Lithuania to form the "Polish Noble State", which began to infect Ukraine and Belarus.
The Rus', who were also beginning to become powerful, were certainly unwilling, so after the end of the Mongol era, Belarus and Ukraine became a scramble between Poland and Russia, and the two sides broke their heads.
The Poles eventually won the war against the Russians, occupying Belarus and Ukraine.
Even the Poles took advantage of the issue of succession after the Tsar's death to make a big fuss, engaging civil servants in ukraine under their control disguised as "Ivan Themitry" and sending one of them all the way to Moscow, effectively making the unknown pseudo-Tsar their puppet.
The Moscow maharaja Vasily staged a coup d'état a few years later, killing pseudo-Dmitry, but the Poles continued to push out the "Tsar", causing serious interference to Russia and becoming the "Moscow Catastrophe" of the early 17th century. But Poland also stole chickens and did not become erosion of rice, and the century-long war made them lose a lot of manpower and material resources and kill countless elites.
It was this history that created the most serious psychological separation between Russia and Poland, with mutual disgust and hatred accumulating.
The war between Poland and Russia in Ukraine was long and brutal, and ukrainian forces were pulled back and forth. Russia was accustomed to using Ukrainian Cossack power, while the local Ukrainian nobles preferred independence, and they even ran to the Swedes for help; when the Cossacks grew, some of them did not want to submit to Moscow and ran to unite with the Poles, so things became more and more complicated.
What was most unacceptable to Ukraine was that Russia and Poland, the enemies of the enemy, had made peace, and they had divided Ukraine according to the Dnieper River. Through the Cossacks of eastern Ukraine, they incorporated eastern Ukraine on the left bank of the Dnieper River into Russia.
After Poland began to decline, Russia became stronger and stronger, and then in the 18th century, the whole of Ukraine was included and became part of Tsarist Russia, but the Ukrainians no longer considered Russians to be of the same ethnic group, and their culture was just another group of rulers.
Russia then attacked Poland, dividing it up with Austria and Prussia, and finally Russia annexed the Principality of Warsaw, making the Tsar king of Poland.
The occupation of Poland lasted until the end of the First World War, when the three major dividers of Germany, Austria-Hungary, and the Russian Empire were all destroyed, which gave poles the opportunity to restore their territory and establish the "Second Polish Republic".
In order to maintain the nascent regime, the dividers naturally did not get any good impressions, especially Russia, which occupied more than 60% of the territory, naturally did not have a good face.
However, the Soviet Union, which inherited the will of Tsarist Russia, spared neither Ukraine nor Poland, which had long been part of the Soviet Union, and Poland was stabbed back by the Soviet Union after the German invasion in 1939 and was once again divided.
The Poles' distrust of the Soviets was literally written on their faces, and when the Soviets finally returned to the Vistula and Oder rivers, the Polish rebels in Warsaw insisted on ignoring them. The Soviet Union was also bare-knuckled, and after several failed attempts, it simply played the trick of watching the fire from the other side until Warsaw was bloodied by the Germans.
The contradictions in Ukraine are also quite large, mainly the Great Purge and the Great Famine during the Soviet union's rule, which is the most tragic history of Ukrainians' memory, and it is also the pressure of the Ukrainian government's eagerness to form national stability after the collapse of the Soviet Union.