Racist Irish stamp

based on a joke my ASL teacher's translator, Rachel, made in class today. (the teacher, Sasser, is deaf, you see.) Some kids were saying that St. Patrick's day is a pointless holiday, and she argued that the Irish were very oppressed when they first came to America. Then after a pause, she said this, and I'm hoping I got it word-for-word. After a much longer pause, I burst out laughing, having taken almost a full minute to get the joke.

In case you don't get it, this stamp is a hypocrite.

Yes, I know it's far to late for a St. Patrick's day joke.

Before anyone asks, I'm not Irish.
I'd like to go to Ireland someday, though.
I've heard about this castle with this rock where you lean backwards out a window and kiss the underside of the stone or something, and you're supposed to get good luck. I just want an excuse to lean out a hole in a castle wall that's 100 feet above the ground