This may or may not be true but would have no bearing on the sentiment of a slave in regard to Independence Day. Nazism brought prosperity to most Germans - but not all. Did German Jews under Hitler celebrate Nazism? No, they rightly hated Nazism, which caused them unspeakable pain and loss.
I believe any fair minded person can understand why a slave in the U.S. would not appreciate the 4th of July. In other words, how can one celebrate the 'independence' of a nation in which he is a slave?
I guess my point was it points out the fallacy that people (not you) make insisting that the FF wanted slavery but compromises to leave it in place for the formation of the country. Less than 100 years later, slavery was banned well ahead of all modern countries of the time.
RE: "This may or may not be true..."
It is true. The short and short of it is that the colonies were trying to pass laws to slow and get rid of slavery, and the crown was "prostituting its negative" (To use Jefferson's phrase) -
Basically we passed the laws and Britain vetoed the laws. The U.S. was born a slave state because Britain forced us to be born a slave state. Here you can find both audio and the original sources/source texts for the law Virginia passed, the full text of the veto, and the full text of a resolution imploring the king, on humanitarian grounds no less. "Please let us do this and help the slaves" Britain flat out said no.
https://librivox.org/short-nonfiction-collection-vol-093-by-various/ (Look at entries 09, 10, 11)
"I believe any fair minded person can understand why a slave in the U.S. would not appreciate the 4th of July. In other words, how can one celebrate the 'independence' of a nation in which he is a slave?"
This is a fair question, and the answer is as short as 10 words:
When a colonial power forces them to be that way.
“In other words, how can one celebrate the ‘independence’ of a nation in which he is a slave?”
Consider Genesis 50:20, New Living Translation. Joseph tells his brothers - the ones that sold him into slavery years earlier:
“You intended to harm me, but God intended it all for good. He brought me to this position so I could save the lives of many people.”
Ask any black in this country if they would agree to go back to Africa. If they would rather stay here then they should APPRECIATE THE 4TH OF JULY!