Lincoln would disagree with you. By the end of the war, with more than a half-million KIAs, Lincoln did not instruct his generals to arrest the other side or its officers. He let the rebels go home to re-build their farms. He used the words, "with charity for all, and malice toward none." He wanted to save the Union, and wanted peace--which means respecting others' sacrifices, even if they were on the other side in a terrible strife, and recognizing them as fellow descendants of the Founding Fathers.
If it's not your flag, you're not obliged to clutch to it. But men like General Robert E. Lee were honored in life and in death by North and South alike. Were they missing something? Do the statue-pullers know better?
By the way, I'm a Yankee. It's critical that Trump "go there" and be willing to remind everyone that it's a big country, we come from different places, and that we respect each other in our loyalty to the Constitution and in our brotherhood with those who, as the Lord reminded Moses about the Egyptians, were "sojourners with you."
Well said.