@Ant1989 Yea, "Who knows" is the best way to put it. For me, this is the weakest part of the story so far. Either they leveled a city with no deaths or they slaughtered an untold number of civilians and the story just plays it as a joke.
If you haven't had latest tankoubon manga up to Vol 08...
Don't know if it's HQ or not....
http://excnn.xyz/manga-raw/178031-tsuki-michibiku-isekai-douchuu-01-06.html