In an Economist/YouGov survey of U.S. adults, more than a third of respondents ages 18 to 29 reported that the Israeli government’s response to the Oct. 7 attacks that claimed 1,400 lives is “too harsh.” Each day Israel bombards Gazans and the United States is not viewed as a peacemaker, Mr. Biden’s political position takes a hit with younger voters who see the war largely through the life-or-death prism of human rights.

To be clear, most 20- and 30-somethings agree that Hamas committed war crimes in Israel. Most do not look at this as an either/or situation: They want America to help both the Israeli and the Palestinian people. But young progressives remain unconvinced of their government’s commitment to safeguarding the innocent. If that continues, the winning Biden 2020 coalition is at greater risk of fracturing — and in the process, making Donald Trump’s return to the White House more likely.

[Della Volpe is giving these young people far too much credit. They’re not on the streets in support of both Israelis and Palestinians; they are marching and chanting the genocidal slogan, “From the river to the sea, Palestine must be free” and attacking Jews on and off campuses. That error leads to a fundamental error in estimation about how bad this will be for Democrats, not just among Jewish voters but among moderates inside and outside the Democrat Party. The GOP has its own problems, but this split could prove politically fatal for Democrats in 2024. — Ed]