rationalfrummie: While I’m sure you thought your first line was funny (about being a YU musmach), it was actually insulting. Making jokes that imply YU musmachim look for kulos is just not funny at all.
Imagine the following scenario: You’re at work, and comment to a non-Jewish co-worker, “I bought a new computer yesterday. It was on sale, and I got a great price!” What if the co-worker responded, “That’s how the Jews are, always being cheap… just kidding!” Would you think it was funny, or would you be insulted?
The fact is that many posters here have posted hateful comments against YU people, accusing them of always looking for kulos, which simply isn’t true. Making jokes which refer to that falsehood is insulting, and is no different than the example I wrote above.