There was the command to NOT shoot them ... if they re man-made, there is technology very far advanced from current known abilities within the Physics limits we know. Instant accelertion to 4000mph then instant stop is beyond our Physics understanding. Being visible on radar and visual then instantly invisible to both is also beyond our current Physics ... unless these objects can come from and return to hyperspace at will. The little greys and big grays are likely cloned biological worker bees fabricated somewhere in our solar system by the fallen angels / bad angels.
Satan doesn’t need bad angels. He has ordinary people who will do his work for free without question.
It’s the Sasquatch theory. If there was one, we would have one.