Using a complete outlier, the co-founder of Toronto's branch of BLM, who has said racist things in the past shouldn't demean the entire BLM organization and message. Nor should it place it in the false equivalency as the KKK. In every organization and movement, especially those in wide-scale national basis, you'll have a few radicals or bad apples. Doesn't make the movement any less noble.
The Civil Rights Movement of the 50s and 60s saw several leaders saw racism or hateful things. Rosa Parks was as militant and belligerent as they came. To many whites, predisposed to believe that blacks were inferior, she promoted hatred. Malcolm X played a key role in raising awareness and built a strong contingency that ultimately helped promote the cause of equality. Hell, even the great MLK was under FBI surveillance, cheated on his wife, and later in the movement, privately questioned their pacifist tactics.
So I guess, if you want to find angry BLM people who you could construe as promoting hatred, you'll find it. But that's not their core message nor their cause. If you're looking for a perfect leader, you aren't going to find it. Gandhi maybe. But some of our greatest civil rights leaders over the past 100 years were far from perfect. From Nelson Mandela to MLK to the current leadership of BLM.
The KKK on the other hand? It's core beliefs are hateful and bigoted. How do you compromise with a group that openly wants to take rights away, enslave other groups, and destroy lives?