The 'secret' might be that France wants to lead a coalition (the EU) as a counterweight to the U.S., since the Soviet Union couldn't do it. It is very convenient that he can damage Tony Blair at the same time.
I'll buy the more sinister idea that France has supported terrorism. Chirac was the first to the WTC---good cover eh?
Also large and growing Muslim population in France. Agreed that somethings up.