AWS is great the servers you run. Those can be anywhere on earth, including physically located at your business
In this instance, a platform decides, effectively "we refuse to host your ideas, go elsewhere." Facebook and Google and Twitter aren't going out of their way to scrub these people off the internet; they are just kicking them off their own platform.
You might consider this part of the "cancel culture", but it's not censorship.
In this case, Twitter et al. thought a LOT about what to do, as they did very little for 4 year's of Trump's presidency, and only decided to act after Trump incited a literal self-coup and insurrection with the goal of illegitimately keeping himself in power.
If in the future "those who think completely differently from me" are going to think liberal ideas are so dangerous to be removed, it won't matter what "standard" we set today. It seems even with the highest standard of "don't support open coups", you still think I will be judged the exact same.
Censorship is bad. But insurrections against legitimate governments are worse.