I don’t know how your reading comprehension is this bad. The OP of this thread said they didn’t know what jello was because they lived outside the US. Deceptichum said “they” call jam jelly, with the “they” being US people. Then maryjayjay corrected that comment, saying “we” (meaning US people) call jam jam and jelly jelly, meaning they’re 2 different things. That’s when your comment came in saying “nuh uh, the world isn’t the US!”
I’m not sure how it can be much clearer. If you’re still having trouble please point out where you don’t understand.