The actual poll[1] paints a substantially different picture: less than half of American Jews polled said that Israel was "essential" to them; the 80% figure comes from a separate group that
explicitly said "important, but not essential."
That could mean any number of things. For example: I have family members in Israel. Their health and happiness is important to me. Does that make caring about Israel's affairs important to me? It would probably depend on how the question was framed. But it would be incorrect to conflate that with support for the Israeli state.
Other important numbers from the poll:
* Only a minority of American Jews (34%) oppose the BDS movement, and believe (33%) that the Israeli government's peace effort is "sincere"
* Only 32% believe the core doctrine of Zionism, i.e. that Israel was is the land of the Jews by birthright.
In other words: I don't think it's correct to conflate the American Jewish identity with any positive or dispositive interest in Israel. We're a big group, and our national identity is overwhelmingly American. Asking us to reconcile our ethnoreligious identity with an unrelated national identity is bewildering at best, and insulting (cf. canards about Jewish loyalty) at worst.
[1]: https://www.pewresearch.org/fact-tank/2021/05/21/u-s-jews-ha...