A brazen carjacker was arrested more than two weeks after he allegedly took an elderly blind man for an unwanted joyride through Long Island City when he swiped a parked vehicle with the senior sitting in the backseat. Dominic Kanin, 30, insisted to The Post on Monday that he was no “thug” despite the slew of charges he is staring down in the case. He was cuffed and charged with grand larceny, kidnapping, unauthorized use of a vehicle, and unlawful imprisonment the same day in connection with