I have quite a few European friends on social media and they always seem perplexed whenever racial tensions flare up in the USA. Some even have openly asked "why do Americans find it so hard not to be racist? It's not that hard." I always respond by pointing out that the citizens of almost every country are naturally xenophobic and/or racist, just not necessarily against people of African descent. In the case of Euro…
Many of the replies to your comment are from Europeans defending their prejudice likewise as "oh but you don't understand, in Europe it's different because you may be surrounded by a gang of people that are clearly gypsy and they rob you, so it's easy to see why!".
But that's the exact same thing with X race in Y country. Such as blacks in America. It's a broad brush stroke based on an experience or group of experiences that eventually paints the whole race that way.