Before the rebellion, the Shiite Houthis, loved dropping dimes to US drone operators on the whereabouts of Sunni al Queada.
But during the rebellion, they gave the Iranians the run of our abandoned embassy, and there was the threat of the Iranians setting up a permanent military capability to choke off naval traffic through the Red Sea/Suez Canal route.
There was never really much of a threat of that last part. That was BS being spread by the usual suspects who wanted intervention.
Interestingly, Saleh(the deposed US backed dictator) used al-Qaeda to attack the Houthis, now they are allied against Saleh’s ex-stooge Hadi, the new US backed dictator.
Yemen’s internal politics are so complicated it makes countries like Iraq and Syria look simple.