You act like the Houthi were innocent victims. They started it. The Houthi supported Al-Quada and their attacks. The US responded, then the Houthi kept attacking. The US didn’t attack all of Yemen, only those Houthi who are killing not just Americans but other Yemeni.
Decrying the US attacking Al Quaeda in Yemen as an attack on all of Yemen is like saying stopping Proud Boys is an attack on America. Proudboy domestic terrorists aren’t America. Attacking Proudboy is the right thing to do. Houthi support terrorism. Attacking only the terrorists isn’t attacking everyone.