People glorify the actions he took, but have no intention of doing anything to improve society. Say what you will about assasinating someone who is objectively an awful person, the folks who spread these memes do little more than that. Spread memes. Want to make the world a better place? It’s as easy as pickin up litter in the grocery store parking lot walking in or volunteering in a soup kitchen. Make the world the kind of place you want to live in with small steps rather than (or in addition to) glorify someone who took large ones.