You as an individual have no authority to pronounce something as sin or say something else is immoral, your ideas and logic/common sense that being gay harms no one and that simply believing that homosexuality is wrong is immoral is your own and really holds no weight compared to what any other random person thinks. The issue is that there is a higher authority that pronounces it wrong. Homosexual sex isn't a sin because digsbe says so, it's a sin because God does and digsbe accepts that fact instead of trying to deny it or rationalize around it. To claim I'm wrong would mean to prove that God isn't real or that the Biblical God is false or prove theologically that the Bible doesn't say homosexuality is sin and the belief we take from that is made in error.
Tired of elections being between the lesser of two evils.When the debate is lost, slander becomes the tool of the loser. -Socrates