Speech against the law on Social Media

Actual intent to carry out violence can be difficult to discern from the angry, hyperbolic — and constitutionally protected — speech and information commonly found on social media.
That was in Germany. In the U.S., however. Authorities can only monitor your account and make an arrest on probable cause (threats) or ask the platform for your account information (which they will give up voluntarily, then can be used against you in court).
But with such action from law enforcement, you have to be on their radar.
Due to the first amendment, 'Congress shall make no law respecting an establishment of religion or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances'.
And other than Copyright, Decency or Defamation and privacy lawsuits.
Social networking sites often have greater protection under the law than their users.
So. In America, hate speech is not against the law. But it can get you in trouble... eventually...somehow...which is a good thing...I think.