If one "understands" such nationalism, multiply this by a factor of greater than one and perhaps this will provide an "understanding" of the alleged "racism" of Polaks concerning Negroes. Humans tend to be tribal. They tend to associate with those having similar designated attributes. Hence the tribalism which predominates on this planet.
... But is there even 1% of blacks in Poland??? Most Poles have never even seen one in their life and probably never will. They have no affect on Poles and I don't understand why they are so hated when they pose no threat to Poland or it's people ...
Polaks do have access to the news media and Polaks also have access to libraries. The Negroes, even from a distant, superficial vantage point, appear so very different to the Polaks. Hence the tribalism mechanism kicks in. From such a point of view the difference(s) are much more pronounced and severe than those associated with the neighboring Slavs or the Aryans to the west.
... I really don't get how futball fans are so racist towards their own players that are black!!
Consider the absurd attitudes and behavior of many football fans towards fans and players from the opposing teams. What is the nature of this superficial, belligerent, savage madness? Observe how these creatures behave over something as trivial as a silly game. Then fuel the fire by including other nationalities, ethnicities, and races in the mix, and these diabolical louts go absolutely bananas. All this over a trivial game.