A look of bewilderment and concentration crosses his face. Oh, dear. He's not sure if this is a case of interdimensional dissonance or something else; if so, he has no idea if their Judaism resembles what he's familiar with on his own Earth. There's the yarmulke, there's the term rabbi and the honorific Rov, but...

"The Lord Jesus Christ," he repeats. "I, ah, don't suppose you're familiar with Catholics?" Wait, he's got to be less specific-- "Or Christians, for that matter...?"