On a moral level, Bernie is helping create a political and media environment that incentivizes Hamas attacks on Israel, which result overwhelmingly in the deaths of Palestinians, not Israelis.

But on a political level, Bernie is damaging Democrats. President Obama’s emotional and ideological need to pillory Israel accomplished nothing for his presidency, and it certainly did not help Democrats raise money or win elections. Sanders’ anti-Israel activism may end up being worse for the Party, because it is more vicious and even less based in reality than Obama’s, and because Bernie will set much of the agenda for Democrats in 2020.

His progressive supporters love that he’s standing up to big, bad Israel. But progressive hatred of Israel is not fact-based—it is an emotional obsession that relies for its energy on presenting a false reality, as Sanders did over the weekend.