He was sentenced to nine months in prison for incitement, and after a delay, started his sentence in May.
Salah has constantly incited violence by telling people that the Jews were about to destroy Al Aqsa Mosque. He has invoked the classic blood libel, says that 4000 Jews were told not to go to work in New York on 9/11, that a Jewish cabal were behind Monica Lewinsky and the JFK assassination.
All of which made Salah a wonderful choice to write a column for The Guardian.
Similarly, despite Salah's explicit support for murdering Jews that can be found on his Facebook page, Amnesty International condemned Israel's making his group illegal during the height of the knifing attacks late last year.
In other words, Salah is a sweetheart of the Left who have no problem with his antisemitism and support of murdering Jews.
Palestinians and leftists aren't protesting against Salah's hate - they are protesting to support it.