Yemen and the American impulse to take sides - Brookings
This article offers a more transparent look at the conflict. It does not involve emotional blackmail and Brookings largely has no interest in (or benefit from) being biased.
It is believable that the Saudis are lying about Iran's involvement, but it is also as believable that Iran is lying about whether they are involved. I do not think that either country can be trusted. I also found it interesting that another article mentioned the cause of the Saudi blockade as being in response to ballistic missiles that were launched towards the Saudis. That seems like a reasonable excuse to use a blockade to try and prevent more weapons from entering Yemen, but it also took place almost 2 years now.
I have previously advocated not taking a side on the personal level because they have both committed war crimes and neither is reliable, but I also don't think the US should be involved beyond how they/we would be involved if no conflict were occurring (meaning continued trade with Saudis, continued strikes on AQ, etc.). As the article points out, there is nothing to be gained.