what we dont like is venomous bigots who are trying to infect other people with their pre-judgemental views on a personal crusade....
You've just given a good description of a racist there bodgeit...Which is what I believe our Peter to be as it happens.
He knows he can't spread his bile about other races without leaving himself open to getting his collar felt, so he simply transfers his 'affections' to a group within his own ethnic background.
Not that it matters, all he manages to achieve is to prove what a hateful little man he is.
If he'd been born in Germany in the thirties he would have probably been one of the first to sign up for the Hitler youth, and would have been watching his parents eagerly in case they said anything he could report them for.