You stopped at a paragraph that left the impression that Douglass thought Lincoln was uninterested in blacks. The reality is the Douglass said that Lincoln did more for blacks than was thought possible.
Selective quoting (and outright lies) are the only thing that keeps the neo-confederate mythology alive.
Bingo! Right on the money! "Neo-confederate mythology" is exactly the main issue. The most hardcore will either publicly attempt to ignore the adverse realities of the slavery machine for the cotton empire. Also today's most ardent neo-confederates whitewash or soft peddle the 100 years of post Civil War, state mandated, degrading segregation, along with painting the perpetrators of mob rule and brutal lynchings as somehow being the 'real victims'.
Another question should be why are the arch neo-confederate spin masters so intent on deliberately masking their current & future agenda(s)?
Those are Douglass words. He doesn't retract them in the later part of the speech, rather he gives Lincoln credit for ending slavery. Apparently you find the first section objectionable, and can't figure out how to rid yourself of it other than to charge those who cite it with "outright lies". Tactically, I don't think employing the ad hominem makes your case any better. You're still stuck with explaining away what Douglass was saying in that first section.