Yet like so much else dividing Israeli society today, the advances by the Alternative for Germany, or the AfD, as it is known, seems to provide more of an excuse for political recriminations and partisan bile than a source of common Jewish ground.

On the right, there was newfound scorn, and worse, for Israeli expatriates in Germany.

Aryeh Eldad, a former Knesset member and medical professor, wrote in Maariv of his revulsion at the “20,000 Israelis who moved from Israel to Germany of their own free will,” whether for “cheaper housing and cheaper cottage cheese” or to live under “the wonderful German democracy” out of a “distorted” leftism. Both groups, he said, were “emotional cripples.”

“These Israelis,” Mr. Eldad wrote, “are not like the dog that comes back to eat his own vomit, but rather like the vomit that returns to the dog that spewed it.”

On the left, there was renewed criticism for the Israeli government that so many left behind when they moved to Germany.

Michael Sappir, a 29-year-old in Tel Aviv who earned a degree in linguistics at the University of Leipzig, in Saxony, and now works in high tech, said the election “makes me think twice about the idea of moving there again, both as a Jew and a leftist.”

But, he added, “the situation in Germany is much, much better than here, where the governing coalition is composed mostly of parties that are intellectually akin to the AfD.” He said, “What’s considered the terrifying right wing there is on many policy points just mainstream here.”

Even after Sunday’s election, Mr. Sappir said, he still believes he would be safer in Germany than in Israel. “The norms of governance, the rule of law, there is much stronger,” he said. “Here I feel like an embattled minority. There I know that we’re a much bigger minority, and there’s at least a pretty broad anti-fascist consensus.”