You can see that this isn’t the case with a trivial example, like if your significant other or a family member was killed and I or someone else riled you up and

You can see that this isn’t the case with a trivial example, like if your significant other or a family member was killed and I or someone else riled you up and enabled you and lied to you and convinced you to go kill someone else who didn’t kill your family member not only would I be held legally/criminally accountable but we intuitively understand this as morally wrong as a society. No free speech is harmed here and the First Amendment protects you from the government silencing your speech.