I did not know this meme exists!
Why no không at the end? Because of hay?
Correct. Khong at the end of a question is used when the answer is either "Yes" or "No". Sort of like "You like Bananas, no?". When given a choice between two or more things it doesn't make sense.
First off apologies for no accents but, to me "Nguoi Uc" doesn't sound right. Sounds simply like "ngu". I don't think I'm the only one.