Yeah yeah, I read the news too. I'm not going to go into my personal experience, but from my time there knowing political actors, I followed the Houthi rebellion and southern secession movement, and the Iran connection very closely. The link had always been tenuous and was cynically and successfully played up by Saleh to gather billions in Saudi and US financial and military aid, before he switched sides and was killed before he could switch back. Until that point the evidence pointed to the Houthis purchasing weapons from a corrupt Yemeni military. Saleh was Zaydi, a fact conveniently overlooked by the media in an attempt to lazily drive a Shia vs. Sunni narrative that people ate up bought. There is only evidence of Iran getting involved after the Houthis took Sana'a, where as KSA had been destabilising the Houthi border region, funding Salafists and building extremist madrassas for decades before then. That's not even in dispute.
"But (KSA) have much less of a will to export "the revolution" to other places - unlike Iran. They kinda mind their own business most of the time." This is laughably ill informed. They've built over 10,000 new Hanbali, Salafist Wahabi madrassas in Pakistan over the past 50 years. Sent extremist imams everywhere from the Philippines, Indonesia, Mali, Bosnia, UK, the Netherlands. Backing the Janjaweed and ISIS affiliated groups around the world. You don't like an Islamic Caliphate? ISIS's principle enemy was not the US, not Israel but Iran which fought them with existential zeal in Iraq. Ignore the posturing, check the last time Iran actually invaded a country. Educate yourself. Stop just repeating the news.
Soo just how is the statement "They are bombing innocent Yemenis who have ZERO connection to Iran" contradicted by anything you've added? It's just a fact, as is the fact that KSA also bomb militants, using them and Iran as the pretext to do whatever they want, including using economic warfare against one of the poorest, hungriest populations in the world.
It's the standard 'but they're killing the bad guys' guilt-by-association, collective punishment line you seem strangely prepared to toe as a justification for brushing off the well documented bombing of innocent civilians. That mindset is probably the single biggest perpetuator of human rights violations on all sides in the Middle East. The casual cruelty of that and the ignorance are bad enough, but to then actively say "As long as it is what it is selling stuff to Saudi Arabia doesn't sound super terrible.", brushing off criticism of both the KSA and those making a buck off the situation, is abhorrent.
You'll happily buy the old, and false, pick-your-poison, brutal dictator vs. extremist Islamism dichotomy that lets you overlook human rights by "our sons of bitches", even while knowing how obviously bad that has worked out until today. But sure, you're "prioritising it within reason". Please. That's just the easy way out.
I don't want to be harsh but you don't seem to be well informed, reasoned or particularly concerned with ethical choices on this issue. Don't think I have much more to add.