From his Twitter thread:
Netanyahu's Likud has prioritized infrastructure and investment in Israel's Arab sector, a very underreported story. But he was doing that before these elections. What explains this increase in support by Arabs for Likud? I can understand the Arab communities being upset at the Arab parties, but why wouldn't they go to a left-wing or centrist Israeli party?
I don't know the answer, but clearly Israeli Arabs do not have the same contempt for Bibi as their supposed supporters in the West.