Honest question from someone whose knowledge of Israel's government isn't deep: does "Zionist parties" mean anything other than the parties which are not Arab parties? (are members of the Arab parties free to advocate against Zionism and Israel's status as a Jewish state?)
All parties except for the Arabs and ultra religious are Zionist. The ultra religious have their own relationship with Zionism, but are members of the government.
While Arab MKs do enjoy freedom of speech, they are ostracized and delegitimized by the majority of Jewish MKs.
> they are ostracized and delegitimized by the majority of Jewish MKs
Not exactly.
A conservative Arab party was part of the ruling government coalition in 2021. They joined with a wide spectrum of political parties seeking to defeat the Likud Prime Minister Netanyahu.