Your explanation is a good one, one I hadn’t heard before but surely part of it.
Also as a politically conservative Jew, I have a few ideas too. One is herd mentality. It’s also true in the Latino and black families I know as well, but bitterly true in Jewish families including my own (extended). Your fellow Jews from friends to family members will be VICIOUS to keep you on the plantation. Verbally skilled and full of sarcasm and bite, these people will heap scorn upon those who stray from voting lib, and encourage others to mock and insult the one who dares to think for himself as well. It is difficult to be a family member who isn’t liberal. I know this all too well. You become more tolerated than accepted at gatherings.
People don’t like to be ostracized from their friends and family. Mocking works. Low info Jewish voters, most of them, will just slide right into the “correct” beliefs, like “choice” even while not fully understanding what they are “supporting.”
Also, Jews seem to strive to be “cool” and accepted. Possibly from being “different” as children, they want to be in the popular crowd. They tend to fall for common wisdom quicker if famous people feel that way.
Liberalism is not Judaism. Conservatism and adherence to Gd’s law, as the Constitution descends from (as good as mortals can achieve), is Judaism. Our founders, especially Jefferson, were judeophiles.
It takes several loud and popular Jews in public showing the rest how life would be better the freedom way to have any impact. There aren’t many doing it. One is Dennis Prager and he is beloved among those who dare to listen.
That is a pretty sharp post, well done.
I think some of our founders, particularly the more "enlightened" like Jefferson was "judaeophilic" for the same reasons modern liberals are: they were a constituency his enlightenment/anti-traditional religion philosophy appealed to because of their experiences, and because they voted for him.
Considering Jefferson's animus against ancient, sacerdotal religions, I doubt a full Torah Jewish polity would have appealed to him at all.