Methinks Chirac doth protest a bit too much. It looks to me like convenient scapegoating for political points against those Arabs who are least likely to provide resistance.
Schoolgirls wearing headscarves is hardly 'aggressive', particularly in relation to other Islamic activities going on these days.
The policy itself may have some validity, but I'm not going to leap to give Chirac credit for dismantling political correctness regarding Islam.
There appears to be more to it than just a simple assertion of being in a different definable social group. There is a major controversy in France about this and related matters. In the context, Chirac has given a political opinion. If it becomes a general outcry, there could be trouble.