Because, apparently we all know what older Jewish men are supposed to look like.
Butch Cassidy in Carnegie Hall [Jay Nordlinger]
I used to see Paul Newman from time to time in New York concert halls. I remember the first time, very well. There was this old man — old, short Jewish man — who was shockingly good-looking. I stared at him, because the sight was so unusual. And only after I stared at him for a bit did I realize it was Paul Newman.
Pardon me, my midwesternism, but how the hell do you tell someone is Jewish if they are not in ultra-orthodox garb anyhow? Is there something called "goydar"?