Bishara Act: Racist or Precautious?

Ynet reports on the controversial bill that the Knesset passed yesterday:

The Knesset passed a bill on Monday determining that any Israeli citizen who visits enemy territory without a proper permit will not be able to serve in the Knesset for seven years.
The bill was initiated by MKs Zevulun Orlev (National Union-NRP) and Esterina Tartman (Yisrael Beiteinu), following the affair of MK Azmi Bishara (National Democratic Assembly). The bill was approved by a majority of 52 to 24 MKs. Among those opposed were Transportation Minister Shaul Mofaz and Education Minister Yuli Tamir.

This was put into action after the situation with Azmi Bishara who was a Knesset member who frequently visited Syria and openly supported Hizbollah. After a police investigation, he was charged with high treason and forced to resign from the government. This gave the Arab Israeli party he represented, Balad, a bad name, and many people on the right started blacklisting them and saying that they couldn't be trusted.
I don't think that just because one man was trying to play both hands it means that the whole party is corrupt. The right is being reactionary, as they always are, and when it comes to making life harder for Israeli Arabs they jump on the ball.
So now we come to this very fishy bill. Why is it that the two MKs that initiated this bill about Israeli Arabs both come from the far right of Israeli politics? The NRP openly supports forced transfer of Palestinians into Jordan and Avigdor Lieberman, head of Yisrael Beitenu, was quoted advocating for the execution of any Arab MKs who meet with Hamas leaders. I have my doubts trusting the legitimacy of a bill affecting Israeli Arabs by right wingers who have extremely negative attitudes towards them. Yet I'm sure they used their scare tactics to convince the rest of the Knesset (who isn't that far from the views of the right) that without this bill the evil enemy will take over the Israeli government and push all the Jews to the sea. As Tartman exemplifies in the standard right wing language of us versus them:

The Bishara affair and the defiance carried out by many of the Arab MKs, such as their visits to Syria and their meetings with Hamas leaders, are not within the scope of freedom of speech, but rather a blatant encouragement of the armed struggle in Israel and the encouragement of terror against its civilians.
From now on the citizens of Israel can relax – enemies will no longer sit in the house of legislation.

If she considers "enemies" as "Arabs and peacemakers" then I'm sure she's right. I believe this bill is going to make it much harder for there to be negotiations with Hamas and other terrorist organizations (note that these right wingers consider any form of negotiations an act of treason) and if they get their way by making a couple more similar bills, it will rid the Knesset of anyone who shows dissent from their worldview. Luckily, the Arab Knesset members are protesting this bill and urging for reconsideration because of its infringement on minority rights and it's disregard for normal people who have family in the "enemy" countries. Let's hope that the right wing's scare tactics don't overrule the Arab parties' appeals as well.