https://www.washingtonpost.com/news/morning-mix/wp/2014/08/1...
(Of course we can discuss if most of the uses of tear gas are wrong, but lets for a moment think that we have a moment were we need to chase away a crowd of evil persons riotong and threatening to kill perfectly innocent children.)
>evil persons rioting and threatening to kill perfectly innocent children
This is a great and important question, and something that deserves way more R&D than it gets currently from the US's leviathan budget, but you should be aware that this lineup of statements is a bog standard bad-faith rhetorical tactic, and may be [mis]interpreted that way (i.e. this is often basically a paraphrase of "if you, Mr. Individual, do not have a solution right now, then you must be OK with the killing of innocent people").
It's largely a solved problem, and has been since the 70's. The cops in the US just don't use those tools and tactics.
https://fivethirtyeight.com/features/de-escalation-keeps-pro...
Your entire chain of reasoning is built on the claim that you have special knowledge of the future. Fine, so do I. If these people are not stopped then they're going to build Skynet and there will be nuclear strikes followed by terminator robots. Prove me wrong.