What is supposedly being suppressed by Cloudflair is kiwifarm's ability to coordinate violent harassment campaigns against vulnerable individuals. I'm pretty sure neither the US nor any nation state includes immediate, credible threats of and facilitation of violence in their concept of Freedom Of Speech.

Moreover, I don't think it's new for a communication company to suppress such things. The problem as Cloudflair notes, is that while this isn't their job, the courts and states who should be suppressing and prosecuting Kiwifarm are falling down on the job.