I’m using banks denying a loan to a high-crime neighborhood address as an analogy to explain why it’s also bad to deny hosting or service based on the domain name alone. It’s basically the Scunthorpe problem.
It's not being based on the domain name. KF was created with the intent of harassing someone, and has continued that to harass people both online and offline. The content on the site is hate, and the content occasionally includes illegal activities.