Regarding your examples. If you say "We should restrict immigration to limit labor supply so that the native born can earn better wages", you
will be read by many people as if you were saying "immigrants are cockroaches". These people
will group you with people who say the latter thing, and with people who imply the shooting part.
I know that for a fact. I live in Europe. We had a migration crisis recently, and no matter what you believed, how nuanced your position was, you always ended up being called either "a compassionless monster who doesn't care about other people dying", or "a traitor supporting parasites in taking our jobs and destroying our economy".
“We should reject colonial oppression of our country” very much implies “we should wage a war against our oppressors” (not sure why you bring religion into this). Suicide bombing didn't enter the western Overton window just yet, but it surely will if things ever get bad enough. For evidence, just skim [0].
> “We should end affirmative action on the basis of race because it isn’t fair to individual members of the majority group” is not the same type of message as “all members of X minority are inherently worthless, and we should purge them”.
That tells me you haven't been on the Internet recently. It absolutely means the same thing in the eyes of a certain vocal minority that currently dominates all social media, and has an uncanny ability to summon Internet mobs in order to ruin people's lives.
> “Rape accusations should be handled by law enforcement professionals rather than by school administrators, and the evidence should need to meet a high legal standard to be actionable” is not the same type of message as “X person claims they were raped but everyone knows they are a lying slut and were asking for it.”
Except in practice the former is understood by many as the latter, and can end up with you in the news headlines and having your life's work taken away from you.
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Point being, rules like Terms of Service or Codes of Conduct are easily weaponized and used as tools of oppression if they're not backed by impartiality, rationality, a firm commitment to uphold the spirit of those rules and to nip all attempts at rule lawyering in the bud. Otherwise, either the service itself will abuse the rules, or the users that are best at escalating minor disagreements will. I have zero trust in Twitter on this matter.
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[0] - https://en.wikipedia.org/wiki/Suicide_attack#History,_pre-19... One of the interesting things I've learned here today is that apparently, the US trained people to perform suicide bombings with nuclear weapons. The Cold War was an insane time.