So you are basically saying it’s ok to do something as long as it is “justified “. Killing is wrong, but killing hitler is ok.
As a society we make distinctions like that all the time. The legality of killing has plenty of nuance and even varies from state to state within the US. Self-defense, stand your ground, castle doctrine, law enforcement, assisted suicide, capital punishment, depending on your stance on the issue some would group abortion into that. There are plenty of carve outs for when killing is legally permissible. Killing Hitler could be part of a military action (again legal) or depending on jurisdiction could be covered under some form of defense of self or others.
When it comes to protected speech we've also set limitations but those limitations are held to strict scrutiny. We have libel laws, we have laws against deceptive advertising, we have laws against dangerous speech in the classic Schenk (sp?) opinion (can't yell "fire"). When it comes to political expression though the courts have been very wary of any encroachment. Popular opinions generally don't need protection, they are popular and accepted. It is the minority, the fringe, those that many find objectionable, that most need the first amendment. Alex Jones says repugnant things but he has a right to have his own beliefs and to express them, just as Antifa does, just as any radical Cleric/Imam, just as Westboro Baptist, just as Black Lives Matters, just as pro-life activists, just as ELF, just as... well that's probably enough examples to offend everyone that their preferred group was lumped in with the others
The aspect that I think will be heading for SCOTUS soon though is a definition of public square in the digital age (free speech itself is a concept, the first amendment is law; the latter is primarily a limitation on government but can be enforced on private institutions as well if lack of venue would otherwise limit first amendment rights). I could easily see the court ruling that at a certain size internet platforms have to allow protected speech as they have become part of the "public square."
