If I had stayed in my world I would have become a mass murdering terrorist, bent on wiping out the human race, or at least putting mutants in power. As it is I teach history, and I have never been happier.
Some people will never forgive you for things you haven't done, but there will be those that take you on your actions here and let you have a new start.
There has always been a part of me that hates myself for what I became. But there's nothing you can do to change what you became with one set of circumstances. The only thing you can do is make sure you don't become that here.