I'm with Kraco on this one, the maou on Earth didn't feel at all like the same maou as in the opening scenes . As cool as I found the opening scenes I am kind of hoping none of that stuff is going to come up again and we can attribute the discrepancy to an introductory joke in keeping with the comedic bent the actual series is going to maintain. Maybe the actual point of the show will be to contrast the fundamental attitudes of the denizens of the maoh's world with those the typical Tokyo residents, but we'll have to see how the interactions with the Hero play out in episode 2 at the least.