with both wicked and decent sides to them

that isn't my point, if one of them had a decent side, i'd give a f. but they are human beings like you and me. i can only reiterate, we've seen that often enough and where this leads to.

there’s harm in completely demonize a person or group of people

particularly that it makes it more difficult to find a stable political solution to the underlying conflicts.

murdering hundreds of thousands of Ukrainians and his own people.

luckily that's an exaggeration. it might apply to russian combatants though: https://en.wikipedia.org/wiki/Russian_invasion_of_Ukraine#Casualties