When did it become illegal to be a Leftist in Israel?

Haaretz.com:

The police, the legal system, the Knesset, the Shin Bet, and the IDF have joined forces with the propagandists of the right to act as prosecutors without a trial.

In the Israel of 2011, it's no longer legitimate to belong to the left. It's illegitimate to campaign for human rights or to oppose the occupation or to investigate war crimes. Such actions earn Israelis a mark of shame. A land-stealing settler is a Zionist; a warmongering right-winger is a patriot; an inciting rabbi is a spiritual leader; a racist who expels foreigners is a loyal citizen. Only the leftist is a traitor.

The Knesset has resolved to create a parliamentary committee of inquiry to look into the activities of left-wing groups "and their contribution to the delegitimization campaign against Israel." Such a panel would make even Senator Joseph McCarthy blush.

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