As long as it's in private, I don't care.
It's all about the norms of society. Not too long ago, homosexuality was paired along side bestiality and pedophilia.
I have a lot of gay people in my family including my grandfather (left my grandmother after having 4 kids). I love for as family and don't think about what they do in private. I compare to morbidly obese people having sex. I know it happens but I don't think about it. I employ similar techniques when I'm with gay family members.
As for the dolls, why are people upset? It's no different than using a sex toy. I don't understand why it's basically fine for a woman to have a vibrator but a man would be called a perv for owning a plastic vagina. On that note, these dolls should be regarded as objects used for entertainment not actual partners.
I know a lot of gay people too that's not the issue. It's that some of these people DO regard the dolls as PARTNERS and that is what I think is wrong.