I always presented that is opinion but the fact remains virtual
slavery lasted at least another 100 years in the form of jim crow,
slave wages and the other symbols you say still exist.
Before 1865 blacks were 3/5th of a citizen, after that there were
virtually zero citizen in a number of democrat controlled states.
I think a more orderly dismantling of that institution would have
worked better for everyone and certainly for the 3% of the population
that died in the war.