The motto of the French Revolution and, subsequently the French republics, is "Liberty, Equality, Brotherhood". There is a delusional start for you right there. Liberty is a rather subjective term, equality is an impossibility and if you are determined to try to make equality possible, you make liberty impossible. As for brotherhood, that may have been fine when considering only the French alone but, of course, the revolutionaries never intended it that way and France has been paying the price ever since. The idea of spreading the revolution to France's European "brothers" led to years of disastrous wars that resulted in France being weakened and the Germans being united. Today the mentality has widened to include people from all around the world; Algeria, Tunisia, Senegal and so on. However, even when such people are brought to France, taught French history, had the values of the Revolution pounded into them, even if they are born and raised in France, it does no good when they have another "brotherhood", one of race or religion that runs far deeper than a liberal civics examination. Any Frenchman worth his snails would look at any of these recent attackers, even those born in his country and say, 'I like the word "Fraternity" but still I draw the line / He may be a brother of Francois Hollande but he ain't no brother of mine'.
That France, the France that restored Christianity in the near east, that explored the interior of North America, that frustrated the combined armies of Europe and built the Palace at Versailles, that France would have no problem dealing with this current crisis, because it had all the tools with which to do so. It had a will to survive, ambition to do great things, loyalty to a single leader and the faith of the "Eldest Daughter of the Church". When the France of today, revives and restores the values of that France, the current crisis can be swept away.