Where I live, while the use of leased property in various unacceptable and/or illegal activities is a basis for canceling the contract and subsequent eviction (among other reasons more directly relevant to housing), one generally needs an order of court to evict a tenant if they protest. This applies to both housing and business proprties, though people's homes have greater protections.

Also, in some situations here the landlord may lose the grounds to proceed if they won't press the issue as soon as they become aware of it. This is exactly to avoid situations where the one side arbitrarily decides throw the book on whatever the other's activities they can pin down on them.

(Whether the comparison is adequate depends ofc if AWS has consistently made complaints to Parler about the objectionable content. Their message included a part where they pointed out they had requested moderation action earlier, so I suppose they have.)

I can see the issues relevant to cloud hosting are different enough so that analogies are not 1-1 anyway. In general, it is a good principle that content that encourages violence and other illegalities is removed from the public. It would be still also a good idea to have procedures where the hosted party could protest if they are engaging in illegal acts or other breach of contract claimed by other party and the enforcement is applied equally.

In what part of the United States can a tenant not be immediately evicted for illegally presenting a clear and present mortal danger to public safety?

What kind of "clear and present mortal danger to public safety" would involve an eviction before contacting the authorities and likely arrest (followed by abandonment and eviction in absentia)?

Landlord overhears tenant saying, “I’ve got a bunch of guns in my apartment and I’m going to start a massacre”.

Landlord is entirely justified in immediately changing the locks and contacting law enforcement after.

Mere hearsay is not sufficient cause for eviction. Might be grounds for calling the cops, but not locking someone out of their home. For all the landlord knows it was a TV show.

Could you please find an example of a tenant being legally kicked out by the landlord himself without even involving the law enforcement or a court of law ?

Yep, on many states something as simple as doing drugs is enough to kick you out at a moments notice even if are making no damage to the property. A digital platform being used to orchestrate the destroying of government buildings as well as planning the kidnap of gov officials and making death threats should get more lenience? Get outta here.

So if amazon found any illegal messages on twitter they would be justified to shutdown twitter without notice?

Twitter can make a good-faith argument they attempt to remove content that is questionable or that incites violence–they can point to millions of accounts and posts they’ve removed for those very reasons. The ceo of parler can not.

This wasn't one of the ways Parlor was being used, was the ONLY way it was being used, there were not thousands of scientists, mathematicians or people from all the politican spectrum like Twitter there, so any comparison with big social networks is misguided to put it mildly.

"Illegal messages" such as the planning of a coordinated attack on anyone with the intent of killing and altering law? You're goddamned right!