I had anger like that also, there's even been a couple recent posts on here from folks who are around the same point as you experiencing it.
I'd fly into a rage at times, it can be unsettling. It's part of the healing process, we all do some damage to our brains by drinking all the time. One thing that helped me after it had happened a few times was to be able to recognize it when the rage was coming on so I could tell myself it's just part of the withdrawal process and don't get bent out of shape.