I think I only read one or two posters who blamed it *all* on Harper, but they were immediately corrected.  However, Harper did contribute to the problem, keeping Khadr in Guantanamo years more than he should have, and fighting every possible legality that he could.  The last decision that Harper appealed all the way to the SCC had so little merit that the Court ruled against him on the spot, something it seldom does.