...Your deflection from basic humanity is sad, however typical...
Whatever.
...You put up plenty of bull crap excuses why that morally weak and insecure traitor decided to turn his back on the country that nutured his education and career...
I make no excuses for the way Robert E. Lee conducted himself throughout his career and throughout his lifetime.
He made a far higher number of morally correct and strong decisions, was far more secure, and proved his loyalty to both the United States and to his native State, far more frequently and profoundly, than a modern (and rankly amateur) revisionist such as yourself could possibly fathom, never mind appreciate or critique objectively.
...If it was as impossible as you falsely attempt to portray it, then no one would have called slavery immoral and a sin...
Many lawmakers in Great Britain, in parts of Continental Europe, and to a lesser extent, in the Western Hemisphere - even within the United States - did, indeed, judge Slavery to be immoral, and some of that many years before the American Civil War, but that does not mean that the concept had deep roots yet within the popular mind, in either South OR North.
It was not impossible - merely atypical - not really on the public's scope - few people really gave a shit, beyond the realm of politics and territoriality - few were Abolitionists.
Hell... Lincoln, most of his Cabinet, most of the Union high command, and, indeed, most Northerners, felt some sympathy for slaves, and wanted the practice ended, but few had any intention of granting equality to the emancipated at-law, at least not before some idiot Southern sympathizer actor-flake decided to kill the President, anyway.
You keep looking at the past of 150 years ago through modern eyes and through modern filters and with the hindsight-wisdom of 150 intervening years to aid you.
;..However people more concerned with right and truth, than what people thought of them did call slavery evil. They were called abolitionists.
Again, most White Folks back then didn't give a rat's ass about Slaves or Slavery, except to end the practice, put an end to Southern territorial (slaveholding) encroachments, provide some relief for the emancipated, then to ship them back to Africa. It was only later that a majority of White Folk even bother to put Black Folk on their scope day-to-day.
Abolitionists were the exception rather than the rule, North and South, and that included Robert E. Lee and other honorable folk who fought on the wrong side.