Please no stupid comments about "if you don't like it go home" as this is in itself racist!
check your definition of racism because that's a bit "off."
Regarding your situation: Poles? Nepotism? What a surprise! More than a few Poles think themselves as the best at everything and think that anytime a Pole isn't 1st or doesn't get the nod in work or play then the deck has been stacked against them (unless it's football, despair seems to set in before the inevitable). They use this mentality to justify their nepotism.
You got a group of parents who fit this mentality, you can't control how people think, you got to let it go. (but correct your definition of "racism")