It gets to their head.

I had had a boss (from a YC-funded company, no less) that behaved in this way. Talked down on me with the g-slur, used language barriers to alienate his peers, and demanded religious sensitivity whenever we met after work. His entire life was defined by this religiously insecure identity, and several meetings were derailed by him thinking he was slighted by the rest of the team. That led to team members avoiding him, which reaffirmed his perception of being discriminated against. In reality we were all just baffled by his inability to adopt a secular work ethic.

As a queer person I could partially empathize with his behavior. Some of the smartest queer people I know are also frustrated, downtrodden and crass in protest of their mistreatment. But they're also generally grounded people that buckle down at work and get things done. They don't accuse people of being bigoted, lash out at coworkers or use slurs in the office. Perhaps it helps that queer identity isn't eschatological in nature, but that's only my best guess.