Vile? Maybe just honest. There’s some harsh but accurate criticism out there.
To be fair, I don’t actually know this Matt Dillahunty person from a hole in the ground. But if your description of “anti-Catholic” was accurate, vile works fine for me. This is probably Religion or Politics forum stuff, but I’m atheist myself and it pisses me off to no end that Dawkins and his crowd think being technically correct gives them the right to be complete assholes to the rest of the world. It’s like they feel atheism is a Get Out of Decency Free card. But I may have been reading too much into what you were reading from this other guy.