Comment taken from the Volokh Conspiracy, made in response to the notion May Day should be redesignated, "Victims of Communism Day".

"The thing about choosing May Day is that it seems to focus especially on Stalin, since the Soviet Union was so associated with that day."

Obviously, we wouldn't want to associate Stalin or May Day with communism.

Also from that comment thread, Personfrompoorlock writes that one of the reasons the US is so stable is that we let the dead bury the dead, so instead of bringing up the past by changing the designation of May Day, we should drop the idea.

When "Spread the Wealth" and "Made enough money" are on that ash heap, then we can talk.