The article linked in the first post has been updated with some quotes from the pilot himself directly after the incident. He said "I flew there pretty close, had the heli already on the ground and got out. The blades were spinning down. Then the machine must have been moved a little and the blades touched the roof."
That the Bell is now just a pile of junk is "annoying, but she wasn't worth much. She is really old."
Now he admits "I took back power which causes the rotor to be pushed down. During that it touched a wall. It was really windy, that certainly played some role. Yes, I unfortunately misjudged the situation. It was like a parking accident."
He also said that the Cobra will be repaired and should be serviceable again.
So I guess the first statement was some kind of shock-induced reaction...