I don't think you can evoke the "KKK" and not be racial.
That's what's kinda interesting (to me). He invokes the KKK and what they did (even with the REALLY strange assertion that some black people would dress up like KKK to do stuff), but then what he advocates they should do - in mimicking the KKK - has nothing to do with race. He urges a quixotic attack on socialist-communist liberals. Other than the KKK, I don't think there was any mention of race.
(Yeah, I know that sounds alot like, "Other than that, Mrs. Lincoln, how was the play?"