There are indeed religious atheists. They subscribe to atheistic magazines, attend conferences about atheism, go out of their way to convince others of their beliefs, write and read books about atheism, rejoice when someone rejects God, and generally wallow in the subject.
Thing is, they have to believe God, if only to deny Him.
Not a new phenomena.
There is actually a parable in the Jain religion about a person who was so vehement in his denial of God that he actually is brought before God and commended to everyone as an example of true and fervent belief! . Very snarky for 4th century BC writing and truly funny.