Not true. I remember (because my father was Jewish) the court case surrounding the National Socialist Party of America's march in Skokie in 1972. The court ruled that they have a Constitutionally protected right to march under the swastika if they want to and the Holocaust survivors in Skokie would just have to deal. And they did. 

The NSPA and the Nation of Islam and "Students for Justice in Palestine" and zillions of other Antisemitic organizations demonstrate and call for the genocide of Jews all the time and it never turns into a violent riot. Why? Because Jews are rational, civilized people who understand the concepts of free speech and rule of law.

Just because you are offended by what somebody is saying does not give you the right to physically assault him.