It's about the scale of the response. If someone rolls their eyes at you, you don't throw them down and stomp on their head. Yes, they were rude, you perhaps would be OK to flip them the bird, but a curb stomp? Really?

And please don't say this is totally different because racism. It was an isolated twitter joke to 140 followers. Tweets don't move the world - but floods of them can certainly ruin individual lives.