The ironic factor that is between the Houthis and al-Qaida, that is, they both have strong anti-American sentiment. For example, the slogan of the Houthis is death to America and death to Israel and God curse the Jews and victory to Islam. And besides that, there is very little in common between al-Qaida and the Houthis as far as ideology goes, but they see themselves as having a common enemy, which is America. And America is in a situation, where the Houthis are fighting al-Qaida quite viciously on the ground, yet now the Americans are allied with Saudi Arabia in strikes against the Houthis.