There's a select few of angels and demons, who see them as equal.
A common stigma among demons, is that they hate angels for acting "arrogant and innocent", like they are better than them. Often this example is very common to hear. Some consider, that they've been banished unfairly, so they join a war against them, just for revenge.
If angels and demons are immoral, they get both excluded for multiple reasons. (I'm not gonna get too much into it, because said reasons all are unique to character stories!)
So far no examples but a sentence should be enough and explain itself-