If I remember correctly, Muslims forcibly spread their religion all throughout Africa, while destroying Native African culture in the process. Muslim soldiers pillaged, raped and killed African villagers. Why did Malcolm X so strongly support Islam?
If Martin Luther King Jr. was so anti-oppression, why did he support Christianity? Christianity has a long history of violence. Moreover, it was used as justification for slavery in the United States. The point being is that religion can be used for good and bad things alike.
Lest we forget, Malcolm X supported the Nation of Islam and Islam. There's a distinction between the two. Despite this distinction, Malcolm strongly believed that all forms of Islam could unite all the "colored" peoples of the world. Did he consciously ignore some of the "bad" parts of Islam? Probably. Does that make him any different from the rest? No.