This is not only the case in Europe, but also in the whole world, and in the intersection of many ethnic regions, historical evolution such as differentiation and integration is inevitable in the process of development.
The difference in Europe is that it can maintain national independence for thousands of years and stand tall among the nations of the world, and such a nation must have its own excellent place. This is also an important reason why there are many small European countries and it is difficult to achieve great unification.
Why is the Czech Republic an "excellent crystallization" of Germanic and Slavic?
Speaking of the Czech Republic, this country is indeed more special, geographically close to the Germanic region, historically and the Germans established a country relatively close, whether it is Shinra, or later Austrian, Austria-Hungary.
However, the region where the Czech Republic was located was indeed the first state established by the Slavs, which is clearly recorded in history. The Slavs originated in the Vistula River valley in present-day Poland, and in the 5th and 6th centuries AD, a group of Slavs who migrated west to the Czech Republic, and in 623 AD established the Duchy of Satsuma, the first kingdom established by the Slavs.
Of course, before the arrival of the Slavs, there were indigenous people here in the Czech Republic, first Celts, later replaced by Germans. After the integration of the Slavs, a new round of national integration gradually began, which is why the Czech Republic was compared to the crystallization of Germans and Slavs.
Later, in the 9th century, the Czechs established the Great Moravian Empire, in the 11th century they established the Czech principality centered on Prague, and by the 12th century, the Czech principality was subordinated to the Holy Roman Empire at that time and changed its name to the Kingdom of Bohemia, because Bohemia is the Germanic name for the Czech Republic.
As shown above, today's Czech Republic is still composed of two large parts, Bohemia and Moravia, and a small piece of Silesia in the northeast corner. That is why, after the German occupation of all of Czechoslovakia before World War II, the Germans called the Czech Republic the Protectorate of Bohemia and Moravia.
Shinra was a loose alliance, but the Bohemian kingdom also had a good position within the empire, and at one point became one of the most powerful kingdoms in Europe at that time. It was also one of the Seven Electors, and the capital Prague was the center and most prosperous area of the Holy Roman Empire at that time.
In the 16th century, the Habsburgs entered the Kingdom of Bohemia, and the Czech Republic entered a centuries-long period of "Germanization". During this period, the Kingdom of Bohemia lost its de facto independent status, a Habsburg province, the status of the Czech language declined, and conversely, the status of German increased.
Later, at the beginning of the 19th century, Napoleon single-handedly dissolved Shinra, and Bohemia, where the Czech Republic was located, continued to exist as a province of the Austrian Empire. In 1867, the Austrian Empire was changed to a dual Austro-Hungarian system, and Hungarians were on an equal footing with Germans.
Under the Magyars, the Czechs were of course unwilling, but there was no way, they could only stay in this multinational empire. According to the "division of labor" of the empire, Austria was in charge of the Czech Republic and Hungary was in charge of Slovakia. That is why, the country of Czechoslovakia, cobbled together by the Allies after World War I, was not destined to last long, because they had long accepted a completely different history and culture.
Until the outbreak of World War II, Germany used the Sudetenland problem in the Czech Republic because 3 million Germans lived there. In fact, it is not surprising that in history, the peoples of Europe have not stopped their wars for territory, and in the so-called disputed areas, a situation in which you have me and I have you is often formed.
Therefore, the statement of who a certain territory has belonged to since ancient times is probably not valid in Europe. The Czech Republic is located in the heart of Europe, which is naturally a disputed area, in fact, it can also be understood as a buffer zone between various forces.
In modern times, the Czech Republic has become the object of contention between Germans and Slavs. After World War II, why did the Soviet Union have to include the Czech Republic in its camp? In addition to geopolitical factors, it is probably believed that this place was historically the territory of the Slavs.