Are you saying parler did not pay its bills? Of course any company that does not pay its bills gets booted; it's standard business and nobody would be alarmed.
Are you saying parler committed a crime? Name the specific crime and cite the relative US code and the specifics of the violation. If the company itself did something criminal I doubt anybody would be concerned that it got the chop.
Are you saying the Owners/Operators of parler committed a crime? Name the specific crime and cite the relative US code and the specifics of the violation. If you've got the goods on the CEO doing something criminal you might have an argument, but then again many companies have had criminal execs and lived-on with new leadership.
Are you saying some fraction of parler's users committed a crime? Oh, now we're into section230 matters and parler is theoretically no more guilty than Twitter, Facebook, and Amazon Web Services itself (who obviously would already be just as guilty of transporting the bytes involved in such crimes).
See, the problem here seems to be that this involves Trump - and for about half of this country, any discussion of that man over the past 4 years has meant that all standards, and rules of debate and discussion go right out the window and they can no longer apply reason to the conversation. Twitter and Facebook have for years contained far more calls for violence and illegal activity including live streaming of acts of terrorism, murder, arson, rape, government overthrows etc. and have been defended by many of the very same people now celebrating this move against a company they associate with Trump. One can discuss any situation, it seems, and have a rational debate but when Trump is involved, suddenly all consistency rules and standards are discarded and usually with some form of "but in this case, the action is obviously justified". Find a way to dial-down the emotions, get the specifics of Trump and parler out of your head, and think through what has happened here.
You need to face the fact that under the current section230 rules that shield companies like twitter facebook and even AWS itself, parler is also shielded. Twitter and facebook have had far more "bad apples" doing bad things and to this day still host people like the leader of Iran, who keeps calling for the Jews to be wiped out and Americans to be murdered. It's very telling that you, like big tech, do not apply your arguments to those companies and seek to deploy cancel culture against them. The entire big tech monster all jumped together, possibly in an anti-trust violating way, to to treat that one particular company differently, and not because it did anything itself that was different from what those other similar services have done for many years, but because employees of Amazon got angry about it acting as a section230-covered transporter of stuff those Amazon employees did not like. By these changing on-the-fly rules, any company that has any users or customers that might do something wrong in the eyes of the mob can be instantly destroyed and that vulnerability, on display now in bright neon letters, exists because of a choice to rely upon Amazon to provide infrastructure. There's simply no way for any company to know in advance what might trigger this execution, so AWS is now proven to be unstable and unreliable and untrustworthy. It converted itself from a no-brainer "known" to a dangerous "unknown" overnight and it may never again regain that level of trust.
Any business with customers/users that uses Amazon for its infrastructure could on any day of the year fire up a web browser and find that some users or customers have done something the internet hates - and within hours could find that Amazon destroys it. This is what has become clear, and NO amount of "but in THIS partisan political situation it's justified" papers over the fact that AWS will never again be trusted by half of the country. They'll use it for now, but they'll never trust it. I've been in tech for many years and I have been amazed at the progress we have all made at getting the world to go digital; early on many non-tech people were very wary of this bright new electronic world-of-the-future, replacing paper with online documents etc. The general public, and the business world, have all become comfortable with the world we engineers, nerds, and geeks built. This AWS action has had a much deeper impact for many people than you seem to appreciate. Like the dog that's been adopted into a family, then become a trusted and eventually loved member of the family, but then suddenly mauls one of the children. The family might keep the dog, but it will never TRUST it again. The clean and shiny plastic glass and chrome world of high-tech no longer is safe for half of the country. Go ahead and assume the whole world loves what AWS did - perhaps you are in a bubble of group-think where every means is wonderful if it serves the interest of attacking Trump and anybody who supported him. People who have lives that are not centered on Trump are perceiving the actions of big tech very differently; it looks dangerous, arbitrary, partisan, vindictive and worse - it looked like a friendly black lab, but now it looks like a rabid pit bull.