Ok I'll Play.
First are you claiming that France lost Because America did not come to their Aid?
Bzzzttt America had already contributed more money and equipment than the French ... just because the French used it badly is not our fault.
Why should we bail them out again? We should have backed Ho in '46 and thrown those losers out then ... Would have saved everyone a lot of lives.
IIRC (this is just from memory, I didn't look it up to be sure) Of the 16 Battalions at Diem Bien Phu only ONE was regular French the rest were Foreign Legion or Colonial troops. Perhaps if the French tried to fight their own battles ... oh wait.

Hell in a Very Small Place: The Siege of Diem Bien Phu was an excellent book, as was Street Without Joy ... perhaps a bit biased, but excellent never the less.