Geoff - look up Lincoln's letter thanking the "brave workers of Manchester", and the reason there is a statue of Lincoln in a Manchester park - a city he never saw in his life, in a country he never visited.
Then you'll understand bravery.

True bravery was poor, working people - who elected to starve (fighting their own former employers) rather than work with materials produced by enslaved hands. Some of the greatest heroes of the war, were ordinary textile factory workers who never even saw the country where it happened.

Notice how this happened at the SAME TIME you call Lee's attitudes as "still commonly deemed acceptable" in. Read that history.

Seriously - tear down every statue of every confederate general and put up a statue to the workers of Manchester in their place - those people voluntarily suffered and died to help black slaves on the other side of an ocean gain their freedom.