I do believe you think so as well. But, you did leave that part out of the OP.
IOW the true root of all evil is not selfishness, but choosing selfishness over selflessness by will alone vs. merely following biologic desires. I would have been satisfied and agreed with that as the OP's argument. That my friend is true evil. Knowing what you are doing is pure selfishness, knowing it and still doing it. Not just merely following biologic desires, but more to the point, when you realize it's just a biologic desire and you may be harming others by following... yet you do it anyways for your own selfish desire instead of choosing the selfless route.. yeah there you go. IOW you choose to eat steak when you are full anyway and know your neighbor is going hungry that night. Yeah that's evil.
Ok, so we’re at some common ground here. I think we agree on the general concept. That's cool
But you’re kind of saying that as long as you don’t realize you’re being selfish, then it’s not bad. I don’t think that’s the case. While I think it’s much “eviler” for a person to be wholly aware of his/her selfishness and indulge in it, the person who is ignorant is still doing the world harm.
We may differ here, but I believe that it’s possible – but rare – to transcend the ego (through meditation, spiritual evolution) and elevate your thinking to a higher plane where you are tuned into, and guided (much as Christians say “by the hand of God”

to the universal consciousness. I believe Jesus reached this height, the Buddha, and many others throughout history.
Again, I can’t describe it personally – it’s never happened to me – however these occurrences have been recorded all throughout history in practically every major world culture.