Your best argument is, you are primarily negligent, and the other driver is contributory negligent by parking his car too close to you.
Assuming the court found "contributory negligence" of the other driver:
British Columbia Negligence Act read as follows: http://www.bclaws.ca/Recon/document/ID/freeside/00_96333_01
1 (1) If by the fault of 2 or more persons damage or loss is caused to one or more of them, the liability to make good the damage or loss is in proportion to the degree to which each person was at fault.
(2) Despite subsection (1), if, having regard to all the circumstances of the case, it is not possible to establish different degrees of fault, the liability must be apportioned equally.
Therefore, you are at least partially responsible for the damage. How much exactly depend on detail of the case and case history in your province. My guess is you are out of luck.
