This issue is a case study in how the open source community systematically protects abusers and excludes LGBT developers. A white cisgender man can publicly claim that transgender people are delusional and suffer zero consequences in the open source community.

What do you think an LGBT developer thinks when they see this? Do they see a safe, welcoming environment where their identities and well-being will be respected and protected? Or a callous, self-serving machine that ruthlessly prioritises short-term technical goals over all else?

You can't divorce your choices from their sociopolitical context just because it's convenient for getting a bunch of code shipped. If you're choosing to collaborate with somebody despite knowing about their prejudice against the LGBT community, then that's a choice you're consciously making. It's a choice that reveals a personal belief system which prioritises code over people.