I did not disagree with that statement about character.
MLK’s character can be judged by any who wish to.
Independently so can any ideas and ideals he offered.
The same has always been true of other leaders in the past.
I often think of David, as a leader, a great leader, and a very flawed man, who loved G-d and whom G-d loved.
No I am not comparing MLK to David. I am noting that greatness in some sense does not always go along with greatness in personal character.