I'm convinced the game was the actual main target yesterday. 80.000 people inside watching the game, would have been horrendous if the suicide bombers made it in.
The German team actually had to evactuate their hotel earlier because of a bomb thread. But that and the French president being present at the game might have led to the security that prevented them from entering the stadium.
It's weird that they didn't just wait for the game to be over and blow the thing up in the packed subway.
They probably wanted it to be on tv, but I can't believe they thought there was a chance in hell to get in the Stade de France during an international match with a suicide vest on.