Picking a fight

Well..... sometime in the afternoon we noticed my brother parking his g/f's jeep on the lawn in his back yard. He parked it parallel to my sliding glass doors so we could see him. He leaned against the front of the jeep, arms folded like a big shot. All of a sudden, their little dog ran to my sliding glass doors and my dogs started to bark. We looked out and opened the doors and heard him say, “Good dog”! He was doing nothing but picking a fight. We didn't say anything back as we knew that's what he wanted us to do.