Brad Greenberg says no, he is not Jewish. He admits that he "looks" Jewish. And he admits that his grandmothers both were Jewish. (And that makes him technically a Jew.) He is a proud practicing Christian.
But, you ask, who cares? Who is Brad Greenberg anyhow? Who ever heard of the guy?
True enough. So never mind.
P.S. He is a religion journalist from L. A. who has taken Ari Goldman's place on a blog site at http://www.getreligion.org/. These newfangled blogs are all one big blur to us. Be that as it may for whatever reasons we have the impression that Brad has the capacity to learn new things. And boy does he have a lot to learn.... good luck, guy.