The idea that someone like Hitler thought he was doing good is a thin facade that does not hold up. It's not okay to say it's good if a million people die, nor is it okay to say that while living in a surface patina and not addressing the evil that is happening.
The benign and low magnitude emotions or behaviors are sometimes the next door neighbors to the toxic and crazy ones because they share the same root. There is a gray area where it stops being benign, but it all depends on the individual and the situation.