Not such a stretch. In fact, it's already happening.
AIDS is the first disease that has been granted "civil rights" to be completely covert. People don't have to tell their sexual partner that they are infected. This is essentially murder if the other person dies.
Murder by AIDS. Interesting theory. Certainly HIV has gotten enough press for people to know that unprotected gay sex with a stranger carries risks.
Also ... not sure how gay ‘marriage’ would lead to higher AIDS risks, or higher risk of murder-by-AIDS. Gay people already have sex. I can see the argument that it leads to polygamy, incestuous marriage, bestial marriage, general degeneracy, the breakdown of the family ... but I’m still not seeing how it leads to murder.
I don’t think that’s what he’s talking about.
False. Many, if not most, states have laws requiring people to disclose to their sexual partners if they HIV and/or AIDS.