They got shut down for going too ham on that woman who died in VA. It's not really a case I'd argue for, as it is not so much about free speech so much as defamatory remarks, considering the things they said.
I hate to push a fallacy, but history tends to backup this fallacy making it less of a fallacy and more of an ignored truth. But, the slippery slope idea is more than Idea with this. Whether for good or for bad, when a movement or group is pressured into giving up or disbanding, that will likely not cause them to get stronger, but in reality may cause them to fall apart. But if they're forced to disband, and all into obscurity, effectively becoming an martyr of their beliefs than it is very likely they will
grow in strength each time that happens. And eventually that will lead to the powerful burning their bridges and the powerless rebuilding them for themselves.
Yes, this is a "Slippery Slope" fallacy at heart, but the slippery slope has happened many times throughout history like this, it all starts with shutting down a rogue group because you disagree with their beliefs and this specific recent event happened, and then its shutting down bigger and bigger platforms until the justifications start to disappear, and you don't need a reason because they have a precedent.
Then the apposing side will eventually gain a following of their own due to the authoritarian nature of the current ruling precedent. Whether it be by hard-felt beliefs or desperate people, a man who offers anything in exchange for power, despite his past, despite his ethics, will gain it, and if that happens, then it's way to late to reverse the course.
Be careful silencing voices, if you strike them down, they will become more powerful than you could possibly imagine, for better or for worse.