Trish, actually many of the angels did start out as gods and goddesses. Gabriel was a Babylonian goddess, Raphael was in a pantheon on the Mediteranian (where his father was the god El),and Michael is Chaldean in origin too!
Angelic energy is very powerful. In fact, everytime they appear in the bible, the first words out of their mouths are "do not be afraid." I can totally see where they started out as desert gods and goddesses.
But changing what we call them does not change what they are
The angels have been tamed down over the years, just as the faery have LOL. It's much nicer to believe that they are cute little cherubs rather than great beings surrounded by fire, thunder and lightening.