This is a HUGE logic fail. Textbook definition of a sweeping generalization. It's the sort of statement where you only need a single example to prove it wrong. It's just not sound reasoning.
What if someone finds literally ALL jokes funny?
What if someone likes sexist jokes but are not themselves prejudiced?
What if someone just has a thing for jokes that are exactly 5 words long? Or 9 if you don't consider a hashtag to be one word.
I honestly expect better from you. Surely you have to realize that your statement is completely wrong, right?