well, the major ones have been mentioned already, including the race and women issues. Not sure there's a whole lot I can add to how many blacks are often far more racist than whites and try very hard NOT to integrate...
What annoys me over here in the UK (Europe) are the people who demand they have social security if they're 'under privelaged'. For example, I know a woman at 23 who is on her 5th child, with 4 different fathers. She's NEVER done a day's work in her life, but the government pays for a flat, education, healthcare, etc. for her and her children. 3 children have been taken from her because she's an unfit mother (class A drugs). Apparently it's her RIGHT to have this free support, but she has given NOTHING to the state.
Perhaps not so much a double standard, but it really p!sses me off. I pay in part for all this support through my taxes.
Another thing that annoys me: where I live there is a large portugese community which is fine (great food). However, some families have been here for 25+ years, but have not even tried to learn english. They don't even teach their children english, so these youngsters arrive at school (my old dear used to be a teacher) and they can't speak a word of english. On the olther hand, there is a healthy Polish community here. They integrate very well, work hard, are polite and generally really nice people. The fact that once community can get on so well yet another so badly does show that it's not 'racism of the local community' but poor integration attempts of the minority.
This riles me.