Those types are terrible. Over at my Judaism blog, we call those types “Philosemites”, because they love their image of Jews. Just, y’know, not actual Jews, and they throw scary (honestly terrifying) tantrums when we contradict them.
My “favorite” example (in terms of just sheer hyperbole) was the personal encounter I had with one of these bright eyed fanatics who said that it was my God-Given Duty to return to Israel (I’ve never been there) so that I may die and usher in the Second Coming, and that that event was the entire purpose of my life as far as he was concerned, and that he was jealous, because I’d be escorting Jesus Christ down from Heaven, and he wouldn’t be. (Needless to say, I got the hell away from that person ASAP).