YS > Nu nu, so some of the Founding Father’s were ohavei Yisroel. Doesn’t change the fact that their vision of what the USA should be was that there should not be a single unchanging vision.
I don’t think this is that simple. They (most of them?) were all extreme rationalists and you can see Jefferson’s disdain for “traditional” Judaism. You see that they welcome Jews as long as they keep their “religion” but keep the same values as others. Very similar to German/Reform situation, I think – and half of the Jews then were of that type (the other half – sephardim).
There is also an interesting story of Sephardi Mordechai Noah who was appointed as an ambassador to Tunis and then recalled by Sec of State Monroe “because it was discovered that he was Jewish” and somehow this was not appropriate. Noah protested, saying, among other things, that he was never hiding that he was Jewish, and he got some sort of apology/acknowledgement from Pres Madison. I did not dig further into details.