YHWH's heavenly host - divine council/Sons of God - are messengers/warriors/protectors. They are "unfallen". They exist to serve and execute divine missions. Fallen angels are just the opposite. Demons are something different all together (in my educated opinion).

However, to address the context of your post, it's not unreasonable to believe that those who "have it out for us" are unknowingly influenced by the unseen realm. I tend to believe that is the case more so than not. It doesn't mean that there is a demon behind every tree and rock out to get you. Some people are just bitter. Ever heard the phrase "hurt people hurt people" or "wounded people wound people"? Even then I believe it is spiritual and will eventually require some sort of warfare to remedy.

Nice post! Look forward to reading more. Bless the Most High!