Well, their Wikipedia article is biased and somewhat counterfactual, as they always are whenever they possibly could be. Kiwi Farms only loosely moderates non-illegal speech, so there are edgelords dropping slurs, yes, but that there are no less than two subforums clowning on Nick Fuentes/America First and related entities should put to rest the whole "alt-right/white supremacist" narrative. Also, there is a dearth of verifiable evidence that the suicide of Near/byuu recently attributed to KF and its admin actually happened - it looks an awful lot like this guy just decided to disappear from the internet for a while (as he has done before) and found a vulnerable scapegoat to help with that.
Go to the forums, do some searches to find threads on topics that interest you, and make your own decisions.