Peter. Don't act like I'm an idiot. I'm not the others. You're basically referring to multidimensional theory and nexus universes. The fact that this one exists implies a likelihood that there are others. You ended up in another one and spent some time there, just like I have here. And while you were there, you presumably were on your best behavior for one reason or another. It's really not that hard to understand.
Now. How do I explain this? I don't care. You could have become the pope in another universe and it wouldn't make me trust you. No matter what happens, you are always going to want power and you are always going to be willing to kill people to get it. Nothing is going to change that.