Right, but we're not under most of the OT law any more, except for worship and behavior toward other people. The parts of the Ten Commandments I referred to atill apply today.But they didn't go deep enough. In the Old Covenant you could hate someone, you just couldn't murder them.
And remember, Jesus said to not be angry at your fellow person WITHOUT CAUSE. He Himself was angry at the merchants in the temple court, and at the acts of the Nicolaitans. if someone tried to harm my family, I'd be quite-angry at that person, or if one tried to invade my home. In each case, I'm not at all above popping some caps.