Both things may be true. Jews and Evangelicals have a different view of Israel than ordinary Americans, most of whom pay it little mind.
Jews and Evangelicals generally support Israel, albeit for different reasons. Some are, as you note, increasingly unsure of that support, especially as it extends the rule of a government that is widely seen (not just by Israel's enemies) as cruel. But older Evangelicals have a nearly fanatical support of Israel -- including those same policies.
And in general, Americans see Israel as an ally in a turbulent Middle East. Their support for it will depend largely on their perception of Middle Eastern politics and our need for their support.
Jews are a small minority in the US. Evangelicals are a large minority. So you can get countervailing trends that end up making both what you said and what the GP said true.
"Young evangelicals are increasingly turning away from Israel" [1]
[0] https://www.haaretz.com/us-news/a-quarter-of-u-s-jews-agree-...
[1] https://www.brookings.edu/blog/order-from-chaos/2021/05/26/a...