While I agree that pulling out of the EU is for the best for the people of France; I do not agree that moving out of NATO will be of any good, nor moving from the influence of USA policies as France is in an awkward position geographically.
The country is in no position to defend herself if a German attack comes or one from another state; if she thinks Russia will rush to their defense, Ms. Le Pen is getting misled by Vladimir Putin. I am not saying she is stupid to trust Putin, only that he is telling her lies.
If there is another war, and I don't think there will be one, Germany will fall within days now there are no Royal Air Force airbases there. The Army can only be expected to hold off ground attacks for a few days.
Then where is France going to turn?
In previous wars, France could call on the Foreign Legion to defend her back in a crisis, but that has not been the situation since the mid-60s and the war in Algeria, the Legion now only bears allegiance to themselves.