The definition/equation of comedy is sometimes said to be "tragedy plus time." So i get the potential for this to be funny. But, i'm not sure we're fully there yet (if we ever even get there related to this event). Johnny Carson used to talk about how it was virtually impossible to make jokes about Abraham Lincoln.
It’s a photo, not a meme. And I’m not sure what I’m looking at, so I have no conflict.
This is the killing of Lee Harvey Oswald by Jack Ruby.
An altered photo changed for the purpose of comedy is a meme in my book.