My opinion on their work is that they are so hamstrung by being inside the fascist monster itself that they have to be very very careful about what they say and how they act else they will be simply crushed by the state. If they openly took a position against Israel they would all go to jail in a heartbeat, so they instead take up positions that are things like "save the hostages" and the like, anything that could convince other Israelis to pressure the state. They're in a very difficult position balancing going to jail against some sort of "popular" line surrounded by a population that is awfully radicalised to the far right by 70 years of fascist rule.