The war in Gaza may finally be ending, after two years of bloodshed and destruction. But among the damage that has been done is a series of devastating blows to Israel’s relationship with the citizens of its most important and most stalwart ally, the United States.

Israel’s reputation in the United States is in tatters, and not only on college campuses or among progressives. For the first time since it began asking Americans about their sympathies in 1998, a New York Times poll last month found that slightly more voters sided with the Palestinians than with Israelis.

American Jews, long Israel’s strongest domestic backers, have turned sharply critical of Prime Minister Benjamin Netanyahu and his right-wing government over the Gaza conflict. A majority believe Israel has committed war crimes as it has killed tens of thousands of civilians and restricted food aid, and four in 10 believe it is guilty of genocide, a new Washington Post survey found — a charge Israel denies. The shift has created new incentives for even moderate Democrats in Congress to get tough on Israel, including by curtailing U.S. military aid.

The damage is also increasingly bipartisan. Despite Republican efforts to identify their party with Israel and to tag Democrats as providing aid and comfort to its enemies, younger evangelical Christians are breaking with their parents on the issue, seeing Israel as an oppressor rather than as a victim. And the breakup extends beyond evangelicals.

“Everybody under 30 is against Israel,” the conservative commentator Megyn Kelly offhandedly told Tucker Carlson on his podcast last month.

The question is whether those younger Americans will be lost to Israel long-term — and what Israel’s advocates will do to try to reverse that.