Nope. I'm mentally ill but I don't think homosexuality is a mental illness. In fact gays and mentally ill people are equally oppressed. You may have meant the ones who are treated as normal yet other and marginalize less privileged groups are the real mentally ill people but the social context being what it is means the mentally ill still feel the effects of stigmatization from it.
Yeah, that's because it's not, it's a factually documented and recorded occurrence in societies and civilizations dating about as far back as history books do and occurs naturally in practically every form of life. I happen to be bi and clinically bipolar (what a fun combo), so I've heard my fair share of shit talk about both and figure it's just best to roll your eyes at the ill-informed, educate them if they're willing and if not, just roll with the punches and go on with your day.
Also, when I was saying "in the minds of those who are actually mentally ill" I was just referring to religious people who hate people for who they love because an ancient fairy tale written before the invention of plumbing that allegedly promotes love and acceptance told them to (I consider that to be quite a severe mental illness, personally). I wasn't talking about just mentally ill people in general, especially considering I'm one of them haha.
This reminds me of the church camps you get sent to to cure your sexual orientation but then u end up meeting your boyfriend there lol