Malcolm X was a dynamic person, a very special human being who might have caused a revolution. He had to be done away with. The American government couldn't let him live. If 23 million blacks found a charismatic leader like he was, they would have followed him. The powers that be couldn't accept that.
Personally, I would be delighted if there were a life after death, especially if it permitted me to continue to learn about this world and others, if it gave me a chance to discover how history turns out.