The slogan aside, Israelis (sorry, "the Jews") have much, much less to fear from Ansar Allah than the overwhelming majority of Yemenis who aren't Zaydi, those being the people the Houthis are actually working to exterminate.
If you find any credible, detailed, reported source that concludes they are in any way praiseworthy, I'd be sincerely appreciative if you pointed me towards it.