The Saudis are certainly to blame, but so are the Houthis, in fact, more so. The Houthis are guilty of unspeakable human rights atrocities against other Yemenis, particularly the Sunni Muslims who don't follow their peculiar sect. They forcefully expelled the small Jewish community under their areas of control, a community that has lived there for literally thousands of years. Their slogan is "Curse upon the Jews" and "Death to America". This group is a cancer and ought to be eradicated from the planet.
Iran has also exposed its true colors by backing such an evil terrorist group.