Crows vs Ravens are my downfall. ID from just images is more difficult than seeing them in nature.
As for other black birds -- tails, eyes, and feather color are a giveaway for me.
We have been watching neighbor crows for the past 15 or so years. I'd share that first there are no politicians in nature. All the earth's creatures have a place in the ecosystem. Crows are a very very small part of killing songbirds. Us humans and the way we live are magnitudes larger in the killing of birds are all sorts.