Last year we went to Florida as a family and DH did nothing but show us up and make a fool out of himself. One particular thing sticks in my mind as an example - we were on the Jimmy Neutron ride at Universal and towards the end everyone on it started singing and screaming and clapping etc. DH shouts "what the fuck are they all screaming about? silly bastards. Shut the fuck up you fucking over the top american twats, its a kids ride, what you getting excited for?"
It ended up in an argument with a big american bloke and to cut a long story short we were escorted out and threatened with a ban from the entire park. Later we saw another family who pointed us out as the "ones that go to america that hate americans" and were promtly told to fuck off back home to where we come from. I was devasted for DS who was so upset and embarrassed by it all and it really spoilt the holiday. Other stuff happened to like that albiet on a smaller scale (like In Disney a model train thing de-railed and everyone was stood around pointing at it until a bloke climbed the fence and went to fix it DH shouted out "oo look, I'm an american, I just HAVE to interefere and be the hero!" 
this was met with a couple of other blokes asking DH was his problem was etc.
This year I want to book another holiday to Florida for next year but DS really doesn't want DH to come and TBH, neither do I. DH and I did speak about all this after it happened and he apologised and swore it wouldn't happen again etc and I said I forgave him but AIBU to still say I don't want him to come with us? it will cause a huge row, I know but to risk all that again?
(Name Changed because of the American Bashing, don't want it to follow me to other threads).