some of the poll maps are very suspicious. the word 'black' can have many meanings in eastern europe (which tbh are somewhat problematic), it can suggest youre a thief if someone calls you black (think black market). a lot of black people refer to themselves as brown in czechia as a result from what ive seen. anyone brown, including roma and turks, are regularly called black as an insult/skin color hybrid deal though plenty of people seem to be aware this is an issue.
i dont really think eastern europe is any worse than western europe (re: holy fuck its all so bad)
i cant really say i know much about race relations in czechia because i think i only have met one roma person from czechia, never seen black people or anything there. very white place its a little jarring after living in america so long to go there again