He lived with the Toures and honored them by taking their surname!!
Carmichael changed his name to "Kwame Ture", to honor the African leaders Nkrumah and Touré, who had become his patrons. At the end of his life, friends still referred to him interchangeably by both names, "and he doesn't seem to mind".[4]
The situation is obviously fucked up.... but that shouldn't reflect on Carmichael... It's not always possible to know everything people do in their lives; even if you lived with them.