I don’t understand how Israelis keep voting him in either.
They aren’t exactly voting him in. Israel operates under a parliamentary system, not a presidential one.
Between 2018 and 2022, Israel had 5 elections because they were unable to form a government. No political party held an outright majority of parliament, so to form a government, they needed to form a coalition between multiple parties. Historically, this had gone fine, but during this period the more liberal parties adopted an “anyone but Bibi” stance, and refused to join in a coalition led by Netanyahu. Similarly, Netenyahu’s party, Likud, representing about 25% of parliament, dug in and refused to remove Netenyahu from being party leader, and the other conservative parties joined in and refused to join a non Netenyahu coalition. With the Arab parties forming a third wing, neither side was able to get to 50% to form a government.
Ultimately, Likud and the conservative parties ended up winning this fight, but only by joining with far right parties that were previously to extreme for Israeli politics.