Eh, my advice is to not hate them. Hate (albeit disguised as righteousness) is their brand… We should pity them, you know, like Jesus might.
Nothing defeats fake religious people like the positive teachings of their own professed religion. Fight cruelty with kindness.
The good eggs, that is to say the Christian/Catholic folks that actually follow the teachings of Jesus, will not mind you denigrating those of their “flock” that do not. Most of them will actually tend to apologize for them, and explain they are lost. These types also almost never try to judge you if you’re not a believer.