Completely unsurprisingly, the troon is lying about what it means. It doesn't mean "truth isn't a defense" it just means you can't use what religion they are as proof they discriminated against you. So "he's a Christian therefore he's a homophobe" will no longer fly. You'd have to... Actually have any evidence for your accusation that someone discriminated against you. Wow I'm literally shaking, it's just like handmaid's tale.