And with virtually 100% of the Middle East and countries with substantial Islamic populations, telling the USA to "but out", how on earth can you blame the US for what those same independent governments or peoples do to themselves?
Here is where the blame lies, first Yemenites, who are killing themselves over racial guidelines, Or to say it another way, they are such bigots they would rather starve children then understand the stupidity of bigotry. Second, Saudi, as they have the assets the cultural understanding and they too were fanning racial polarization. Third, Iran, who's leaders have been giving aid on a racially backed system for years.
I frankly don't see where the USA has any vital interests in Yemen, has any reason to care more than anybody else on earth or if for any pursuit into insanity and does assist in any way, will be thanked for such assistance.
As an American, I am pretty tired of having the hand that feeds them, nipped.