Gee...when I travel in Europe, I am required to carry my passport for identification for a variety of reasons including being identified at travel/transit checkpoints, if stopped by authorities, etc.
So, if I want to enter a stadium so I can mingle with the crowd before blowing myself up, I might need to have my passport with me, even if it is fake, to help me get past the security checkpoint at the entrance. After all, it has worked up to this point. Why not again?
Since the stadium checkpoint guard was probably killed (the Lord bless this hero and may he RIP) when the bomber set off his vest, we are probably not going to know exactly if it was the obvious faked look of the passport that triggered the pat down or if the check and the pat down were being carried out separately. All that has been reported is that the vest was detected through outer clothing during the pat down. After the explosion, the other two stadium suicide bombers were obviously still on the outside of the venue and, unable now to get in, had to find other targets. One attacked a McDonald’s; the other a bar if the reports I read were correct.
The more important information is where this passport and any others that may be collected) has been logged during its journey from Greece to Paris; especially in Belgium where they probably did their final mission workup and collected the weapons and bomb vests prior to crossing into France in rented vehicles. That information is going to be key in running down the other SOBs that helped these murderers commit their crimes.
A couple news reports I checked said he is alive. I don't know if he was injured or not. Apparently the terrorist panicked and ran off before setting off his bomb. I don't know if it was a long distance or just a few yards.