I've noticed from my experience that the less female influences that gay men have had in their life, the bitchier and nastier they seem to be. Just from details recounted to me by a wide variety of gay men, those with absent mothers, or alcoholic or drug dependent mothers are really the worst behaved.
In the child's world, men learn many of their manners, empathy, compassion, and how to treat others from their moms. When a mother figure is absent, or so overshadowed by a male spouse as to be ineffective in parenting the child properly, bad behaviors will result because there is no one to curb it. These children become nasty adults.
In a recent post, I was verbally attacked for encouraging honesty in a relationship before sex. Interesting that the mere suggestion that two people be honest about their feelings for each other before they have sex would inspire insults, and bitchy behavior, but it did. These guys are the gay equivalent of "bullies" in the straight world. Only they prefer to bully behind the safety of internet posts, because their ideas wouldn't stand the light of day. Add unfulfilled and unused testosterone to that, and you've got guys with a serious problem.