Regarding Yemen, we don't hear much about the atrocities because the cause is supported right here: https://theintercept.com/2016/05/06/former-u-s-diplomats-decry-the-u-s-backed-saudi-war-in-yemen/
" Saudi Arabia and the other Arab states that form the Gulf Cooperation Council (GCC) have been brutally bombing Yemen for more than a year, hoping to drive Houthi rebels out of the capital they overran in 2014 and restore Saudi-backed President Abdu Rabbu Mansour Hadi.
The United States has forcefully backed the Saudi-led war. In addition to sharing intelligence, the U.S. has sold  tens of billions of dollars in munitions to the Saudis since the war began. The kingdom has used U.S.-produced aircraft, laser-guided bombs, and internationally-banned cluster bombs to target and destroy schools, markets, power plants, and a hospital, resulting in thousands of civilian deaths.