No, I don't think any Jewish voter threatened her with a gun so they didn't "Make" her do it. She had the same pressure to support the war that other congressmen had, but in addition, she knew that Israel supported the war and that many American Jews similarly supported the war. NY, more than just about any other state, has a large and influential Jewish population and they are mostly Democrats. In this case and many others, elected officials attempt to support the views of the electorate, particularity those that pool there power.
In other regions the elected pols defer to a base that are hard right Christians. Nothing new here...
Brian