Do they really want to be dictated by Brussels?
Brussels can say what it likes, but in general, when France does not wish to do something (including pay fines directed by the European Court of Justice), France simply ignores Brussels and ignores the court too.
And the enforcement mechanism is...?
What the UN does.
Issue the demand again, more stridently.
Lather, rinse, repeat.
Until circumstances change and France doesn't need to keep the policy anymore, and changes it to more closely resemble European norms...but the fine never gets paid.
It doesn't actually really matter. Have you ever looked into the Congressional Record concerning this matter?
http://www.thetruthseeker.co.uk/article.asp?id=90
Where was it EVER stated that the Truth will set you free? The "truth" will NEVER set you free: it will enslave you.