I think they do look white and are a sub group of whites and they themselves often say they are not white, when it benefits them like trying to say they are a minority and face discrimination. If they never did that and the whole history of being antagonistic didn't happen they would be gladly excepted as white. Many did want to just get along and they changed their surnames and integrated within white societies over the years. That's probably what happened with Bill Maher's and Simon Cowell's parents, they didn't want to be part of the rigid jewish religion that only lets you marry other jews, they just wanted to live their lives so married a non jew out of love.