The Outsiders are only monstrous because they are foreign creatures from an unknowable world. They do not belong here they are anathema to our realm. But back in their realm they fit in just fine. They belong there.

The White God created all the different realms/dimensions/branes/planes & any other word you would like to use to differentiate the Outsiders home & ours. He created this one for us & the Outsiders home for outsiders. But now the Outsiders are trying to invade other worlds