Netanyahu has been actively considering the closure of the northern Islamic Movement since last summer. However, the Shin Bet has previously warned him off a ban, fearing it would drive the movement underground.
On Monday a northern Islamic Movement leader, Sheikh Yusef Abu Gammah, was arrested, accused of inciting violence and organizing an illegal gathering in the Bedouin town of Rahat in southern Israel.
Ghanem said he feared Netanyahu would not stop with Salah and his followers.
"If Israel takes this major step against the northern Islamic Movement, there is a real danger that it will target next the Balad party [of Haneen Zoabi] and the southern Islamic Movement....
"Netanyahu's approach only serves to expose to the Arab population in Israel their true situation. They will react to this and relations will deteriorate still further."
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