As another commenter mentioned, the US was all too happy to get involved later on. However, France certainly deserves its share of the blame, as do the British for their "traps" in Iran, Iraq, etc. It's especially unfortunate that in recent decades the US has moved from condemning to supporting to taking over their role as resource (and especially oil) kingpins by continuing their exploitation of these resources through governmental interference.
Innocent US stumbled into the Vietnam War after evil France meticulously trapped the US into the war, reports US government. French fries will hereafter be known as Freedom fries, declares US government in ensuing report.