Just dating adults of the same sex and shagging them in private isn't a problem. You see it in loads of animal species too, there's a minority in a few hundred species who only mate and pair bond with other same sex adults of their species. It's natural and healthy as long as it's consensual and doesn't involve kids, animals, or any other fucked up unnatural fetishes. The trouble came when sadists, necrophiles, paedos and zoophiles and the like decided that because homosexuality was considered marginalised sexuality or "queer", they had anything in common with them and invited themselves into the gay rights movement.