There are also left wing bigots. For every Trump or Cotton, there is an Ilhan Omar or a ... well, I can't think of another at that level, but I would be very surprised if there wasn't one. Evil is not soley on the right wing.
I'm trying to think who says that slavery should be criticized at the expense of truth. Who, exactly? Trump is furious that the Smithsonian is saying that slavery is bad. We get that. And there are some things the Smithsonian could do to balance it. For example, Washington was a supporter of slavery, but the Smithsonian could have said that he freed all slaves he personally owned at his death. Oh, wait, they did.
On the other hand, they could have said that Lincoln strongly opposed slavery, but said that he did not think whites and blacks could live together as equals. Oh, wait...
What we shouldn't do, is deify our great leaders; they were men, subject to faults, and we shouldn't try to hide those faults.
That estimate has been updated to reflect new data.
If we apply the 13% excess mortality rate to the remaining three Confederate states not in our analyses and include excess mortality from the Border States# and foreign-born fighters who fought for the Confederacy then the total estimate of deaths in the Confederacy would approach 300,000. Doing the same for the Union states would bring the death tally there to more than 400,000. Combined, these totals match the national tally of 698,000 deaths reported earlier.
But as you see, many of those dead in the Civil War were fighting to keep black people enslaved. Interestingly, not all of them were white. There were some Native American soldiers, and while blacks were not allowed to serve as combat troops in the Confederate army, some did serve as support troops.
About 75% as high, according to best estimates.