Yes I was taken aback how violent that scene was but I do realize they deserve what was coming to the termites.
I don’t mind the violence unleashed by our gang, when I think of what they had just been through. Rick was trussed up at a steel trough to have his throat slit...before that was the encounter with Joe and his gang, and before that the fall of the prison and a serious beating.
They all must have some PTSD going on. I can understand how they snapped and just vented their rage.