The Houthis are a local group comprised of local tribes fighting for their rights and against Saudi hegemony. They absolutely have a right to do that.
Iran is not bombing or recruiting mercenaries from other fascist regimes like Pakistan and Egypt or from another GCC stoked conflict (Sudan) to deploy in Yemen to fight against locals.
Iran did not cause the massacre of hundreds of thousands of innocent Yemenis through indiscriminate bombing runs, like the Saudi+Emirati regimes. Even the US was forced to halt weapon shipments, so horrible were the atrocities.
So no, the terrorists here are the fascist Saudi and Emirati regimes, who have together caused the deaths and suffering of millions in Sudan, Somalia and Yemen, through their proxy wars.