Who draws the line where a custom is harmless? Religion still dictates the lives of billions of people every day. And I don’t believe in a positive, liberal, live and let live manner.
Someone fancying some of the same gender affects no one other than the individual. People are gay. They’re born gay just as people are born white, brown and various other shades.
No one is born Christian, or Muslim or Tory or Communist, it’s a learned trait and should judged as such and not afforded special privileges. That doesn’t mean I would go out of my way to try and offend someone but equally, I also won’t lie when the OP asks for my opinion on a subject matter, ie I’ll not be climbing Uluru or walking naked into my local mosque and wiping my dick on the curtain, however I’ll happily voice feelings on Uluru being closed to hikers and I’m more than happy to call out the parts of Islamic* doctrine I feel are idiotic.
NB* feel free to insert and other religion.