It's not politically incorrect at all. 'Good' and 'bad' are just too simplistic ways to interpret our complex world. It's idealistic to try and put people in such simple categories, and it leads to a delutional worldview.

The only 'politically incorrect' part is that some people might jump down your throat for pointing out things about Hitler which weren't terrible, because unfortunately neo-Nazis abuse this rhetoric as a wolfwhistle or for whitewashing. But as long as you're clearly not doing that, there's nothing politically incorrect with saying Hitler drank water.

I mean... technically, yes, we all do good and bad stuff.

But you can't say Hitler was a good person just because he was against animal cruelty. I don't think any person out there is cartoonishly evil to a point they never did anything good - that doesn't make those evil persons not evil.