A large share of American Jews now say Israel's war in Gaza amounts to genocide, a shift that is bad news for Israel's standing with its most reliable American base of support.

• 30 to 40% of American Jews now say what is happening in Gaza is a genocide.
• That is striking because most were raised to love Israel, and support for Israel is a core part of belonging in many synagogues.
• The people reaching this conclusion are not easily fooled, which makes the shift harder to dismiss.
• The finding points to a growing split between Israel's government and a big part of the American Jewish community.

Outlook: Expect the gap between Israel and American Jewish opinion to widen the longer the war in Gaza continues.