Whataboutery and Lincoln

I don't like whataboutery - it's so boring - but sometimes it's useful or even necessary. I see people comparing Putin's war (which I utterly condemn) to the recent acts of the Israelis or the Saudis, but I wanted just to say this. Now we see the horrors of war in real time, do you understand why I regard Abraham Lincoln, who waged an unnecessary and, I think, illegal war against the South in which 700,000 in total died, as a wicked man and anything but a hero?