Angels are not Demons!
Angels Can't be Demons
Angels can take on human form when ever they desire.
Are they are shape shifters?
"Let brotherly love continue. Be not forgetful to entertain strangers; for thereby some have entertained angels unawares." Hebrews 13: 1
Where Were They (demons) Before the Flood?
There is no reference to demons prior to the flood. There is no Biblical evidence of the creation of demons during the six days of creation. In fact, after YHWH created the world it was said; "Then God saw everything that He had made, and indeed it was very good. So the evening and morning of the sixth day." Genesis 1:31.
Since there is no mention or evidence of demons prior to the flood it is logical to conclude that demons are a post-flood discovery.
I understand the Bible to teach that demons are the disembodied spirits of the giants Gen. 6:4.
Why do Demons seek Embodiment and are earthbound, but Angels seek adoration and are heaven bound?
"For I am convinced that neither death nor life, neither ANGELS OR DEMONS, neither the present nor the future, nor any powers, neither height nor depth, nor anything else in all creation will be able to separate us from the love of Yahweh that is in Messiah Jesus our Adonai." Romans 8:38.