Yeah, you were given Iraq and destroyed and made it province for Iran. You told Houthi's to try conquer all of Yemen and topple government. Now you want to destroy another country. All for religious motivations.
That is no more than couple hundred to few hundred prisoners, and of course none of them are Saudis like the Houthis claimed. Houthi's need Iranian help to get advantage at negotiation table. Like when Iran struck Aramco facilities in Baqeeq. Houthi's think they should rule all Yemeni's and all of Yemen without democratic process which Yemeni's actually seek. That is not going to work. Even if Saudis leave Yemen, nothing is going to change about Yemen.