So if Jewish isn't a racial classification then why do doctors ask about it? My boys grandmother is Jewish. And the ob/gyn and the ped both asked questions about their ancestry. There is a certain Jewish ancestry line that has certain health issues. I can't remember the name of it, but the boys are not related to it. But that certainly makes it seem like Jewish would be a race.
And on the other front - I'm a mutt. I don't know what all heritage I have. Some Native American, in fact I think my great grandmother was full blooded Cherokee, but that is just from anecdotes and pictures. There's some Irish, some German, etc. I've done some investigating into my heritage, but when the people who are older than you either don't know, don't tell, or don't care, it's hard to find out much.
My husband is *mostly* Scottish. And identifies very strongly with that. We travel to festivals and all of that jazz. In fact, I'm pretty sure now that my sons think we are all Scottish, even though he's not their biological father.