I'm more exposed to American conservatism. And even here I barely understand it. I used to be Christian, but I left the religion before I realized I was bi, and before I knew genderfluidity and trans people existed.
I guess I'd have to know why individual religious groups, countries, cities,(etc...) have anti-LGBTQ beliefs. Maybe there are no blanket statements that properly address it for the entire world.
A lot of homophobia can be traced to how a given culture reproduces. Traditionally (as in, at least two thousand years), Chinese men could legally have a wife but also additional lovers. Emperors are well known for this (indeed, like a third of Han emperors had male lovers), but it wasn't exclusive to emperors. During the medieval period (idk it was like somewhere between 400 and 600, I'm on my phone so can't check rn), there was a scare that relationships between officials and their wives were in trouble as the men were too focused on their male lovers instead. Monogamous same-sex relationships were rare and usually temporary as there was immense social pressure to reproduce. Confucianism served as the ideology of reproduction.