The source of all actions are beliefs. Morality is absolute and exists within the conscience. Immorality is moral inversion. You know what's right by knowing what's wrong an vise versa. Bad people have to know what's right in order to go against it or invert it. They know that they're bad and they try to protect their own ego by creating delusions to cope with it and then project those lies to others so they can believe in a false reality.
Yes, selfish, or distorted morality (sinister), false beliefs.
NO. Nobody can act on selfish beliefs without meaning to because every action is first consciously acknowledged. You don't do anything without consciously thinking it through unless you're an actual retarded robot.
And if someone is generally selfish it becomes a subconscious habit. And they mean to do what they do. You don't accidentally do something selfish. You intentionally disregard and ignore the rights, feelings, and dignity of another person but would be upset if that action was done to you.
You're patronizing me right now asking me questions knowing I make sense and learning from me and then start pretending like the shit I'm saying doesn't make sense when it clearly does to protect your arrogance. You started off asking valid questions just to start being disingenuous.