KF and Joshua Moon support what you could probably call "free speech absolutism". It's not a position I agree with, but it's a valid political stance and it means that your right to hate white people on Twitter and A+H's right to hate black people are equally worthy of legal protection.
KF is absolutely helpful. I've seen people give genuinely good advice on KF and there are plenty of communities here that wouldn't exist without KF. Take a look in the off-topic section if you want to see what I mean.