Jefferson is postulating an agreement that in return for being freed from slavery, blacks would be transferred to Santo Domingo.
It doesn’t say all blacks would be forced to leave America. The assumption is similar to Lincoln’s, that the freed slaves would be delighted to leave the United States. Frankly , he never thought this out very clearly. . if this is your only evidence.
Jefferson was the President of the United States for eight years . . . where is the legislation to get this accomplished? There is none, because he is just musing out loud for the benefit of Gallatin who was Ambassdor to France at the time.
If this were a serious proposal, I should like to see the legislative language. I think his position was similar to Lincoln’s assumption . . freed slaves would love to move back to Africa and govern themselves.
So when Lincoln proposes it, it's 'deported' but when Jefferson proposes it then it's 'transferred'? No bias in that choice of language, is there? </sarcasm>