Ooooooops. Hasn't Ricky gotten the memo on disbelief? Tsk, tsk. I quote from the "What Is Atheism?" page at the American Atheists website:
Atheism is usually defined incorrectly as a belief system. Atheism is not a disbelief in gods or a denial of gods; it is a lack of belief in gods.
Repeat: "Atheism is not a disbelief in gods." In his Tweet, Ricky appears to have confused disbelief with absence of belief. I hope he doesn't get kicked out of the club.
Oh, and "To each their own" is ungrammatical, "each" being singular. Of course, Ricky wants to avoid "his," and "his or her" is awkward, so he uses the standard illiteracy, "to each their...."