(1) The Bartman incident occurred in Game 6. Both the umpire and the fielder Moises Alou said that day that the ball was in the stands and unplayable. Alou has later changed his story, but the film shows that it was a few inches over the stands, higher than Alou could have reached in, and that many fans went for it.
(2) If that unplayable ball had been magically caught, it would have been the second out of the inning, not the third.
(3) The net result of the incident was that Castillo was walked and took a base - not great, but not a particularly dire situation when you're up 3-0.
(4) What put the game out of control was Cabrera hitting an easy ground ball to Gonzalez, who pulled a classic Bill Buckner move and muffed an easy double play - off a ball that bounced directly into his glove.
In other words, if Gonzalez had fielded that ball properly he would have gotten one out to end the inning if there were no Bartman incident and Alou had magically caught the unplayable foul and Castillo hadn't gotten walked.
But, more importantly, if Gonzalez had fielded that ball properly he would have gotten two outs to end the inning in a simple double play even though Alou hadn't actually gotten the foulout and Castillo actually did get the walk.
(5) Gonzalez is the reason they lost the game, not Steve Bartman. And it is the whole teams' fault they lost game 7. Idiot fans bullied a harmless fellow fan who did nothing wrong, rather than actually watching the game and realizing what happened.
You are right, but the concept was that Bartman was the Jinx personified, and that all bad things that happened after were due to the curse.
It is unfair to blame Bartman