He made himself satan because he was created with the choice to become Satan. According to dub theology.....and others...........he too had freewill. Would you or I create something with the potential to destroy miilions of lives........if we could avoid it? If you could create an automobile that would NEVER kill anyone, would you? Or.....would you create an automobile with the potential than millions could be killed if they didn't follow instuctions? Jesus seems to have chosen the latter with humans involved instead of cars.
that's beautiful.