How do you feel about the right to yell "FIRE!" (when there isn't one) in a crowded enclosure?
Falsely shouting "Fire" in a crowded theater is not protected Free Speech. (See: Schenck v. United States).
Crude political hyperbole is not a knowing and willful threat against the President of the United States. (See: Watts v. United States). Hope that clears it up for you.