This is after he has been previously suspended from the knesset, for accusing Netanyahu of wanting a "final solution" for the Palestinians and for saying “All lovers of peace must join forces, Palestinians and Israelis, Arabs, Jews and the international community, and tell Israel to end the occupation now. (...) The Israeli government, which is a fascist government, supports, encourages, and leads pogroms against the Palestinians. There is an ethnic cleansing going on.”
Other members of the Israeli communist party have already been arrested for organising protests against the war.
They're pretty stable in the polls.