I'm not too surprised; they have had mass protests against multiculturalism and "Islamisation" for quite a while now. Their population is overwhelmingly White and Muslims are around 0.1%, yet their voices are among the loudest in Europe.
As a Black woman I am reluctant to visit many of the countries in Eastern Europe, and certain Central European countries like Poland. The big cities would probably be OK, but their reputation for racism and seeing these huge protests is off-putting.