What Jefferson wrote in the Declaration regarding slavery and pointing out that the King pimped his veto was removed at the request of two states. GA and SC.
https://vindicatingthefounders.com/library/jeffersons-draft.html
As to your two aspects of progressivism, I’m not going to do that here. I’ll ping you elsewhere to two separate items.
I am looking at your link and I am thinking this man is mistaken. It is my understanding that the Declaration was being drafted by a committee, and it was the members of the committee that said his anti-slave language wouldn't fly.
I have no recollection of the original draft being sent out to the representatives of the states for commentary, so if they never saw a copy of it, how can they object to it?
This is what I remember:
On June 11, 1776, the Continental Congress selects Thomas Jefferson of Virginia, John Adams of Massachusetts, Benjamin Franklin of Pennsylvania, Roger Sherman of Connecticut and Robert R. Livingston of New York to draft a declaration of independence.Knowing Jefferson’s prowess with a pen, Adams urged him to author the first draft of the document, which was then carefully revised by Adams and Franklin before being given to Congress for review on June 28.
It looks like it was Adams and Franklin that stripped out all the anti-slavery language.