Image source – https://tinyurl.com/3p4tmsb5
Recapping the last episode of the original series. The final episode featured a never-ending riot of public mutant hate, with Charles Xavier attempting to explain the rights of mutants. Henry Gyritch exposes and seemingly kills Professor X, but he isn’t actually dead. Magneto amplifies his brain waves so Charles can send a message to Lilandra of the Shi’ar for help. Charles says his farewells to the X-Men before departing to Lilandra’s planet, as that is the only way he’ll survive. As Charles was killed on Live TV, multiple furious Mutants rallied against the opposing force. With many of them wanting Magneto to lead them.
Obviously, he couldn’t as he had to make the moral decision he knew deep down he needed to make, in order to save Charles.