If we just met, yes it is rude. We're strangers, my life story is none of your business. If we're more than acquaintances, I expect it would come up naturally at some point in conversation so not rude (hopefully).
I'm a visible minority so I have to weed out the people who are just trying to satisfy their curiosity about why I'm not white. Those people don't ever accept the answer that I'm from Vancouver, or that my parents are from Winnipeg. I will never be Canadian enough for those people because of how I look.
Nobody ever asks my white spouse out of nowhere whether he speaks X language even though he's given no indication that he does, and nobody ever asks him where he's really from.

Inspector Gadget
Care Bears
Babar
Rupert
Mona the Vampire
Monster By Mistake
Mummies Alive!
Tales From the Cryptkeeper
Freaky Stories
Magic School Bus
Stickin' Around
Ned's Newt
Anatole
Cardcaptors
Beast Machines (it's a sequel to Beast Wars)
Xiaolin Showdown
Jackie Chan Adventures
American Dragon: Jake Long
Are You Afraid of the Dark? (not a cartoon)