Yemen has been in the grips of a brutal civil war since the Houthis seized the capital Sana’a in 2014, and the internationally recognised government retreated to Aden to the south. The Houthis are an insurgent group that controls most of the northern part of war-torn Yemen and largely follows the Zaydi sect of Shia Islam. New Delhi: The Houthi rebels of Yemen said this week they were joining the war against Israel, raising fears of the ongoing conflict spreading wider in West Asia. The civil conflict in the run-up and since has been seen as another theatre of the…