That Lance Shabazz breh, the Khalilah Ali lady and that bald headed young-ish breh sounded like the type of Negroes that were slave catchers. Malcolm came to understand true Islam while Elijah was basically just a poorly educated preacher/con man.
Malcolm was a criminal before he joined NOI but gave that life up.
In the end, the number 1 issue was that Elijah was intimidated by Malcolm. He had money/power and was content to sit on it. He had a positive impact on many poor/undereducated/destitute black people but I'm not sure his message was strong enough to capture the middle class and more educated parts of black America.
Malcolm could speak to the rich and poor and get his message across no matter what. Elijah knew this and he also knew that Malcolm was honest to a fault. Malcolm would outshine him and eclipse him AND his children.
Malcolm had an ego just like Elijah but Malcolm saw a bigger picture that Elijah just couldn't see. Elijah was content to be an urban/northern hero in the hood while Malcolm saw problems everywhere. That there are people today who still side against Malcolm is absurd. The FBI literally tracked every move of Malcolm and didn't find a single ounce of fukkery. Man lived clean as could be while Elijah was knocking up teenage broads.