If you read the Mistborn trilogy, the first book, you will understand what I mean. The thing is, I don't expect my friends to be perfect, and I will never criticize them for their imperfections - I am myself far from perfect and have done a lot of things in my life that didn't make me all others very happy, and I would be foolish to expect other people to be 100% trust-proof.
Right. She is a greedy scum, and every her action that contradicts it was done out of greed still. I don't really see what there is to talk about: I like Isabela, you don't like her, so let's just agree to disagree.
Yes, I am aware of it. As I said before, it is the final result that matters. You can always pick some deed of a person and judge him her by it alone, but it is wrong. If there is any judgment of a person to be made, it should be only by the final results they've got. And the final results are as such: as a result of Hitler's action, Germany lost the war and was split in half, one half totally stripped of any freedom of choice and prone to an overwhelming amount of sanctions, another half becoming a Soviet's slave. As a result of Isabela's actions, as I said, Qunari coup was halted, Templars were stopped from establishing a totalitarian dictatorship in Kirkwall, countless organisations of thugs and blood mages were destroyed... So, here you go.
Perhaps. His biggest mistake, however (and I'm talking about mistakes in management, not moral mistakes), was not the genocide, but the war he started hoping to conquer the entire Europe. This mistake cost him and his country everything. We can praise his economical achievement as much as we want, but in the end it all went downhill due to his decisions and his decisions alone.
I actually do not care for her reasons. She did what she thought was right, and so be it. What matters is that she acknowledged (in my walkthrough) her mistake in the end and came back with sorry-s. In my eyes, the ability to acknowledge one's mistake and do something to fix it means a lot. She proved once more that she is a strong character, stronger than to hang on her past.
Who knows what would happen if Hitler won... Maybe we would live in a totalitarian North Korea owning the entire world. Or Germany would bring its strong technological and economical system in other countries and by today we would travel freely between star systems. What matters, however, is what happened in the real life. No sense theorising what could happen if something went differently - in the real life, Hitler failed terribly, and that is how history will remember him, as a failed dude.