They are not dishonest, this is just bad faith argument. Platforms were not passive regarding Parler for long time trying to make them comply with TOS. It is not true that they would ignore issue before.
And the real world violence significantly raised the stakes - both legal and practical.
But the platforms aren’t being honest about this – they’re claiming that it was about terms of use violations. I’m saying “stop pretending like this argument from the platform makes any sense and let’s have a real discussion about the ramifications of banning groups from a platform when they become political unpopular.”