In 2017, a man named Robert Pattison in Detroit, USA, in order to celebrate his joining the fire brigade as a firefighter, brought a watermelon as a gift to his colleagues when he joined the company, and was fired because 90% of the firefighters in this fire brigade were black, which was naked racial discrimination for them!
So why can't black people be given watermelons in the United States? How does watermelon bring racial color to the United States?

In the 19th century, before the emancipation of black slaves in the United States, the most widely used slaves of Southern slave owners were blacks, when a large number of blacks were sold from Africa to the Americas without freedom. At that time, southern slave owners usually allowed black slaves to grow and sell watermelons, and watermelons once became prizes for white slave owners to praise black slaves for their hard work. After slave emancipation, many African Americans relied on watermelons for their livelihoods.
Over time, "black people love to eat watermelon" gradually became the cause of ridicule by Southern slave owners, and even some white people thought that black slaves were short-sighted, delicious and lazy, and a small watermelon could make them satisfied. Watermelon has gradually become a cultural symbol with racial discrimination, especially when people of different colors talk about and mention watermelon, which will make the black race have unpleasant associations.

In the late 19th and early 20th centuries, watermelon, as a symbol with a discriminatory charm, was printed on some daily commodities, which also played a role in fueling the waves.