I won't use CloudFlare if they are internet bodyguards for Nazis. I've registered my displeasure. I did not participate in the DDoS attack.
It's your choice to shun the providers that support free speech (yes, that means letting people you do not like speak, there was a time once that even ACLU understood that) - but it's not what happened here.
Real people were swatted by real posts on KiwiFarms. No tears will be spilt if these internet tough guys/gals can't afford their hosting bill and thus close down shop. Another group of keyboard heroes face minor consequences for their disgusting actions.
Your view of free speech isn't workable. You tell others to preemptively hamper their own liberty and free speech so these habitual line steppers can preach intolerance.
What you want is the freedom to speak without consequence. That will never exist, nor should it.
> as a result of other people using their free speech rights.
Running a DDoS is really stretching the definition of "using their free speech rights", I think. But firing you from a job or closing your bank account for saying wrong things is "private companies adjusting their priorities" too. I wonder how long you could make a living if you can't use banking services, or phone services, or internet services - all of which are run by private companies? How long it would be before CPS shows at you door to take your children - because private utility companies refused to serve you and it's not safe for them to be there anymore? You can take that "private companies adjusting their priorities" pretty far. If you think in this situation you still have free speech because you can still stand on a public square and yell into the sky - you definition of freedom of speech is flawed, and honestly, pretty useless in practice.