I try not to do business with companies that censor on political grounds. I don't like politics being banned in a professional context, but I slowly see no other solution.
The political alignment of many Parler users isn't a secret and if they decide to measure skulls again, I might be in trouble. Still, I don't see them as a relevant threat at all. It is even more ridiculous as the terrorism scare.
However, the actions of SV social media sites and hosts like Amazon censoring unpopular opinions and content outweigh that danger from neo-nazis by magnitudes. These groups have absolutely no political power in the 21st century.
They have more influence than a decade ago, but that is mainly due to their ability to reinforce their prosecution narrative and martyrdom.
On the internet there are calls to violence in any political group, even vegans and cat lovers. We ignore that because they aren't relevant. But if you seriously crack down on cat lovers, you might need to expect real violence.
Either there are rules and principles that are valid for everyone or there are none.
Some say people get influenced by far-right propaganda. Far-right groups think in the same way in that they believe everyone not on their side is an "NPC".
I think Dorsey and Zuckerberg handled it relatively well in the grand scheme of things. Their latest ban attempts were over the top though. I know that some people might need help instead of a Twitter account, but that is beside the point. They set the precedent for countries to suppress their opposition and for state propaganda. I think Uganda is one of the latest examples.