In the tangle of back streets in the city of Umm al-Fahm, the three-storey building that until recently housed the headquarters of the northern Islamic Movement stands dark and empty, its front-door padlocked shut.The movement's leader, Sheikh Raed Salah, has been forced to decamp to a large covered market on the outskirts of the city that has been hurriedly converted into an unlikely hub of political activity for Israel's Palestinian minority.Tens of thousands of visitors have come to this protest tent in the past three weeks, since Israeli Prime Minister Benjamin Netanyahu invoked emergency laws – bequeathed by the British Mandate authorities in Palestine 70 years ago – to declare the movement an "illegal organisation".Salah told Middle East Eye that the move was "a declaration of war not just against our movement but against Islam and against the whole Palestinian community [in Israel]. Everyone feels targeted."