User blog comment:B214/Volume 23 discussion blog/@comment-175.136.214.240-20171016073623/@comment-28884330-20171027034930

That's if the Heavenly Dragon in question tried on purpose to destroy the world... A world that is most likely weaker in relative durability than a dimension made to safely take the attacks of Satan-Class individuals...

Issei wasn't trying to outright destroy the dimension anyways, so you're just strawmanning this whole... Ugh, this is probably pointless to say too. So thick-headed...