And if the French didn't get involved in the American war of independence in the first place, the American colonies would have had to send troops in when London ordered it.
Yes the French did help the US in the Revolution. This I cannot deny, but remember, that was mainly because they were still ticked off at England for the 100 Years War.
They held their own the first time (With British help, of course), and the second time, their government screwed the military over and they didn't have a chance (They certainly showed their courage at Dunkirk, however.).
And the US showed up late to both events. Try to be on time next time. 
Yes we didn't come to the party along with everyone else. I'm sorry but technically speaking, we are still a young nation. Why should a 5 year old have to settle things between midde schoolers.
Now we do accept blame for Vietnam, though it was a French Colony.
As a descendant of UE Loyalists that got to Canada a few steps ahead of being tarred and feathered, I only have this to say: "Bloody Seps." 
I can't argue there. My family has defended the US since it was a british colony. Including the French and Indian war (our expansion of the 100 Years war). My family has killed it's share of French, British, German, and Viet-kong.
And I still blame the UK for Iraq. Their empire crumbling allowed a madman into power there. Yes, Cuba is our fault. We may not be perfect but we are still a little kid compared to the European powers.