I don't think that anyone is advocating we just accept the violent side of our nature and not manage it.
Instead, perhaps it would be helpful to accept that we all have dark thoughts. Understand that maybe the darkness isn't in the thought, but in the way we interpret it.
We can recognize our darkness every time we see something wrong in someone else. That is our unconscious rejecting our own dark side and projecting it onto someone else. If you feel offended and angry – often blaming and complaining about others – you have spiritual work to do.
You are free to reject your dark thoughts, but you can also attend to them, follow them, learn to dance in your darkness, run through it and splash around in it like a puddle. Give our darkness a hug, hold it and feel its warmth. Cry for it because the world doesn't know how to love it.