There are a lot of questions lurking beneath the surface of your argument, many of which invoke difficult questions like the allocation of power and responsibility between the public and private sectors. I definitely think that we need stronger laws about hate speech and organized violence, and most definitely better enforcement. It's telling that the government will spare no cost to shut down a dark net drug market, but won't lift a finger to save trans lives from websites like this. So, we might find a solution to this problem in law, but we could probably write several books worth of material fully expanding on the implementation and implications. In any case, we cannot expect this solution to be implemented by breakfast tomorrow. What we might find tomorrow morning is that Kiwi Farms is responsible for another murder.

Naturally, they will vigorously reject claims that it's a hate site: it's in their interests to portray themselves as such, and hate groups are not known for placing a high value on the truth. It's obvious to everyone else that they are, in fact, a hate site, and that their purpose is to organize harassment and violence. We do not need a court's opinion to make this judgement, though I would welcome such an opinion nevertheless -- these people should be held accountable in a court of law.

As a private business, CloudFlare enjoys the freedom to choose with whom it does business. If they were required by law to provide services indiscriminately, then they could not be held responsible. But that's not the case. No privilege comes without responsibility, and the means by which they exercise this freedom should be in accordance with their values. In terms of values, I expect them (1) to have values compatible with peaceful society, and (2) to act in accordance with those values. Should they fail to do so, it reflects poorly on the people responsible for making those decisions.