Long before the latest election in Israel, Benjamin Netanyahu was a polarizing figure among American Jews. But even many of his supporters said this week that they were appalled at his last-minute bid to mobilize Jewish voters by warning that Arabs were going to the polls in droves, and his renunciation of a two-state solution to the Palestinian crisis.

Mr. Netanyahu’s party won the election and cheers from hawkish American Jews. But in interviews this week, rabbis, scholars and Jews from across the country and a range of denominations said that with his campaign tactics, he had further divided American Jews and alienated even some conservatives, who had already suspected that he was more committed to building settlements than to building peace with the Palestinians.

Even with Mr. Netanyahu’s postelection interview walking back his statements against a two-state plan for peace with Palestinians, many Jews say they are worried that the most lasting outcome of the elections will be the increasing isolation of Israel — not only around the world but also from the younger generation of American Jews. Unlike their parents and grandparents, these Jews have grown up in an era when Israel is portrayed not as a heroic underdog but as an oppressive occupier, and many of them tend to see Mr. Netanyahu as out of step with their views on Israel and the world.

Aaron Voldman, 27, who recently returned to Wisconsin after a year studying on a fellowship in Israel, said he was still “outraged” at Mr. Netanyahu’s campaign, especially his election-eve pledge that there would be no Palestinian state if he was re-elected.