My guess is houthis are a joint cia/mossad asset , explains their tenacious nature that survived so many bombings also explains kid gloves approach by Biden admin towards the houthis , in turn houthis are least concerned over attacking Israel.
Houthis look forward to their masters in the US administration -
the leli and green democrats in biden administration .
What houthis want to achieve is upperhand over their rivals in Yemeni civil war, they want international recognition over their rivals and want to squeeze revenue to the legitimate gov of Yemen.
By cloaking their attacks as a fight against Israel ,the houthis are playing to the gallery of leli and green democrats.
Leli and green democrats have shown their praise to houthis by holding of attack on them, only when UK unilaterally attacked ansaralla did US unwillingly join the campaign.
Also American lelis and greens have ensured that ansaralla is not sanctioned as FTO but with the far less severe designation of 'specially designated global terrorist'.
The assassination of houthi leaders from irgc would have crippled them but instead Israel had to take the initiative with US publically distancing itself from the action.