This EXACT same situation happened to my girlfriend's car...at a grocery store as well. My girlfriend gets out and asks if the other driver is okay and the first thing that comes out of his sh!t eating mouth is "What the f*ck is your problem! It's kids like you that don't deserve their license!!". There were tons of witnesses too that sided on my girlfriend's side and gave her their contact info for the insurance agents to confirm the story.
Even after all the witnesses spoke with the insurance agents, they still concluded it was both their fault, 50/50.
Fuck Farmer's Insurance.