"I rejoice in a belief that intellectual light will spring up in the dark corners of the earth; that freedom of enquiry will produce liberality of conduct; that mankind will reverse the absurd position that the many were, made for the few; and that they will not continue slaves in one part of the globe, when they can become freemen in another." -- Fro the first draft of George Washington's inaugural address.
George Washington and Thomas Jefferson had to deal with more pressing issues at the time and put off freeing slaves for a later generation.
Honestly, setting aside anachronistic moral issues, I don't think they are any different than a random selection of modern US politicians.
Read through their letters and through contemporary news articles and you get the impression that in some ways they were even more fractious and petty. The vapid insults and conspiracy theories they published aimed at each other often make even Trump look good. (Probably the biggest misconception I had was that the 'Founding Fathers' got along pleasantly even if they had the occasional intellectual disagreement. Nope, not at all. And their political positions existed on a much, much broader scale than I had ever imagined.) They don't come across as remotely exemplary characters even compared to their peers.
Then you have things like the Alien and Sedition Acts, where even white men were arrested and prosecuted for criticizing the President, and you realize we've got it pretty good these days. Frankly it seems almost incredible that the early republic survived.
I think the real lesson to learn from the early days of America is that the right circumstances and processes can make a workable union out of even a hugely disparate population - but that there are still limits. Early America made it only because the shared sense of values and community was just enough.
Come on, it's an anonymous troll account with an obvious goal of ridiculing pro-PC argument. Check your #{x}!