My FFIL is... not the most progressive individual, to say the least. For example, he does not approve of gay people (if only he knew I was bi xD). anyway, my MoH and best friend in the whole world is a very loud and proud lesbian. I'm concerned that if she brings her SO to the wedding, he'll try to start something. This is the man who showed up unannounced at the hospital and walked in to find me pumping breast milk for my daughter, and he decided to walk home without telling anyone (the hospital in question was not close to his home), just disappeared and then raised a huge stink about the fact that I would be doing that while we had visitors, even though they hadn't told us they were coming.
Would it be wrong to kick out the father of the groom if he tries to raise a stink or cause problems? I don't particularly like him because of the way that he is, and how he acts, but I don't want to put my FH in a weird position with his family either.