This is a long overdue message to radical Muslim and other far-Left terrorists (Antifa) that Freedom of Speech does not mean Freedom from Consequences. Yelling Death to America/Death to Israel may or may not be Freedom of Speech (I personally believe that it is more incitement to violence than it is speech), but that does not mean that these incitements will be ignored and go unanswered.
Why would any sane State accept as benign, people who openly call for the destruction of the very State they demand to enter, solely to meet with sworn enemies of that State? If they are as pro-Palestinian as they claim, then they should renounce their American citizenship and immigrate to the West Bank or Gaza where they can help their brothers directly firsthand.