Yet it is an opinion that has no evidence to support it.
No evidence? Really? What about the lives as they are actually lived of gay people, both by their own accounts and by their families, friends, work colleagues (etc.) who see them? For decades they've been able to see the happiness that openly being in relationships brings and living lives and finding their own happiness according to their own lights; now they can see the happiness that getting married and/or having children can bring should they choose to do so.
In other words, its precisely what you don't want to allow it to be - an argumentum ad populum.
Wrong. We all know how hopeless you are in understanding fallacious reasoning and why it's fallacious - hence your slavish devotion to the negative proof fallacy to this very day - but a fallacy of this kind always has to have a 'because' in it somewhere to be fallacious. The 'because' is the giveaway. Thus it would be a fallacy to say "Homosexuality is fine because most people think that it is." Most people do indeed think that it's fine - that fact is supported by a wealth of evidence -, but that's not my argument here and not what I'm saying.
So no, not an AaP at all. Which is exactly what I said
I'd suggest that there are many people who have been on the receiving end of the damage that both can produce.
What is the damage according to you that homosexuality produces? That of infidelity I've already identified (in #353) - what about homosexuality? Remember that the difference here is that: "...
most people have sufficient wit to be able to see the harm/damage caused by infidelity (because of the broken promises and the betrayal of trust that it involves) and may well have been on the receiving end of it themselves at some point, and not only the harm that isn't caused by homosexuality, which would be merely a negative, privative thing, but the positive and active happiness it brings to so many people."Is this going to end up in the same bracket as the evidence of those "good reasons" why "homosexuality was viewed with revulsion through history and across cultures" that the dog ate before you were able to post it?