Um, the reason why Bret Hart blames Triple H for it is because if you read Shawn Michaels book, the screw job was Triple H's idea. According to Shawn's book, After the meeting where Vince told Bret it would end in a DQ, Vince met with Shawn. Vince didn't know what to do. It was Triple H who came up with the idea of having Hebner call for the bell during the sharpshooter reversal spot. Vince & HBK just went with it.
Triple H has since never denied this. Bottom line is its fact that regaurdless of how little power Triple H had back then, Vince needed an idea and was desperate to come up with a way to insure the Belt didn't walk out onto Nitro the next night. Vince did what he had to do as you all said. And what he had to do was to use Triple H's idea. This is the real reason for Triple H's stroke in the company. Its believed that his relationship with Stephanie got him to the position he is in, when in reality it was his idea on that fateful night in Montreal that got him to where he is today and if anything helped him get into Stephanie's pants.