Helpful, I got the "joke". It just wasn't very clever or funny.
You said that Groucho Marx said, "speaking on the EU", that he didn't want to be part of any club which would have him as a member. It's s very well-known quote which has pretty much been done to death.
I merely pointed out, in the interests of accuracy, that he wasn't actually talking about the EU when he said it.
Total non-story. The fact that you won't let it drop isn't really doing you any favours.