American soldiers are overwhelmingly from vulnerable classes of people. They’re typically poor, lack a college degree, are from a minority, trying to getting citizenship, or otherwise just trying to improve their circumstances. Have you ever met soldiers? They’re literally just normal people. Saying they chose war is like saying that a coal miner choose to get black lung. Military One Source on US military demographic As for Iran’s massacre of it’s own civilians, that’s been covered by the news world wide. Quite frankly it’s nearly irrefutable. Human Rights Watch: Iran massacres civilians Iranintl: +36k killed during protests The Crimson Winter HRA report on Iranian massacre Iran shuts down internet during those protests