Lincoln should have compromised with the South by letting them keep their slaves but make incremental changes to their quality of life. Right.
Are you seriously saying that slavery was ended by one single act from Lincoln?
There were massive movements behind him, whose seeds were sown decades before Lincoln ever even thought of running for political office. The machine that brought about slavery's end was oiled by the sweat and tears of countess abolitionists, freed slaves, sympathizers, and even politicians who worked tirelessly to end it.
Your glib dismissal of the arduous work of people like James Oglethorpe (who laid out the frame upon which many abolitionist thinkers hung their arguments), Fredrick Douglas, William Garrison, Susan B. Anthony, Harriet Tubman, and literally thousands of others who risked (or gave) life, limb, and fortune to kill the beast does them a massive disservice and weakens your argument.
You look at Lincoln and say he ended slavery with a single revolutionary action by taking a pen and signing a sheet of paper that set slaves free. But that pen was filled with the blood of those who fought and died for years and years to bring about that ending. The abolishment of slavery wasn't a revolution. It was an unbelievably slow journey that only culminated in that final act you reference.
You'd do well to realize most revolutions are actually evolutions that only look fast and easy in hindsight. Change--real change--takes work, it takes time, and it takes the efforts of countless people whom time will simply forget.
I'm sure you're probably joking, but this wasn't meant as a Black History Month essay. It's the debate I got into with a Sanders supporter at work who insisted that the country needs a revolution, then went on to talk about Lincoln's "revolutionary" act.
My only point is that wasn't a revolution. Lincoln was a capstone on something that had started before he was even born. To forget or toss aside their efforts and struggles is just not fair to them, and it's intellectually dishonest.