Airports are another good example. People move in close, then complain about the noise. DFW was built in the middle of nowhere. Everything has built up around it. Now you have noise sensitive areas.
Back to the original post, I say have at it with the pig races. If it offends the Muslim neighbors, so be it. I think they knew the pigs were there. If they don't like it, sell the property and move! The farmer was there first.
I'm tired of people having to be so concerned about offending someone.