What is the legal and moral liability in this situation (pedestrian brushing against car in his own garage)?

I have a renter staying in my house which I am also living in -- not really my idea, it was more like he asked because he didn't have anywhere else to stay, and I have him here not without reluctance. (He asked for a cut-rate rent rate in exchange for labor, which he is sometimes slow to do.)

Now the incident in question. Usually he parks his car in front of the house, but one day when I came home and he needed to get his car out of my driveway he put it in my (2-car) garage instead. However, he parked so close to the center that when I parked my car in it I barely could get my door open enough to get out (even though I was parked as close to the far end as I could). I pointed this out to him, but he declined to move his car. I then tried to get to my house door by walking between the cars, but my body brushed up against his side mirror. That is not a problem with my car, but apparently it was rather flimsily attached to his car and my brushing against it was enough to detach it from the car body. At that time he said OK it was his fault for how he parked, but now apparently he has changed his mind and is asking me to pay for repair as well as my car insurance information. Do I have to pay? Should I? Is there any reason to give him my auto insurance information (I wouldn't think so since I was a pedestrian here)? Would you think it wrong if I were to ask him to move out because of this?