It seems that the Arab nations can unite for a cause... but not a good one.
This is the old guard of repressive regimes fighting for the world they recognise - it is ironic when General Sisi and the Saudi's use terms such as legitimacy.
The rebels in Yemen may be Shia, but that doesn't mean they dont deserve their rights.
I suspect the plot linking them to Iranian influence has more to do with Arab uncertainties over the American negotiations with Iran that could potentially work out.
I doubt that will happen and I suspect in the long run the Iranians will regret trusting the Americans, but right now atleast it is surprising to see arab nations allied with Israel against Iran.
It's like they learnt nothing from someone called Lawrence.