It's a beautiful litmus test. Ask some questions, get insults back where anyone with a shred of real knowledge would respond with clarifications, and you know you are dealing with a phony. This particular one seems very familiar, too. I wonder which sock we are dealing with here.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition