These sound just like the Foo Fighters described in WWII.
I’ve always thought this was enhanced tech from those days.
Space is a big place. Getting from here to there would take an awful lot of energy. So, it would be logical that it is terrestrial.
They likely have little to do with the Bible or any religion. It’s more likely they are from some government—and those clearly are not moral organizations.
They are, in a way. Because those Foo Fighters were secret weapons. Allies won the war, allies got that war booty and a couple of years later we see essentially foo fighters flying all over the place.
Renato Vesco identified the project as the Kugelblitz.