The best post I've seen on this subject is here - https://www.reddit.com/r/AskHistorians/comments/1lt4rb/was_it_the_truth_behind_the_critical_controversy/?

It covers a lot about Che, including his feelings towards black people. The short answer is, no, he did not hate black people and was not a racist. The long answer is more complicated, the post covers a lot and I've read it a couple of times over the past year or so when researching Guevara. Hope that helps!