“Not self-defense”
Indeed not (insofar as the US and Britain are concerned). For Yemen’s Houthi goal is specifically an anti-Israeli-Zionist-Administration goal. No more, and no less.
This is a goal that is soundly based, in the present ‘Enduring Occupation’ circumstance. (And we must remember . . . that this “Occupation” is one that has endured since the early months of 1948. From the Palestinian and from the Yemeni perspective.)