Did america make a right decision turning down the opportunity to provide assistance to the people of france?

It depends on what you mean by right. Both yes and no could be a correct answer. Depending on what incident you are speaking of, I would probably say yes.

“America has no permanent friends or enemies, only interests”  

― Henry Kissinger

maybe you should ask google for the answer for the question you're looking for

no every country is held to the same degree as others just some member countries such as the usa and germany are more economically sound so the need to show there support to all others