Of course everyone knows Iran is their main backer against Saudi Arabia since they want to bock down the Saudis in Yemen, Saudi Arabia did the same to Iran in Syria when KSA led its gulf/Arab allies to support the Syrian revolution and rebels against Assad backed by Iran.
Both countries have been engaged in a proxy war for supremacy/influence in the region . This is not even debatable . Iran is only furthering and protecting its own interests in Yemen just like Saudi Arabia is doing the same . None is wrong or right here. Each is only after their own interests which is fair enough in geo politics.
Israel.is watching while eating its popcorn by the side .