"Are to blame. Brett mcgurk the US envoy to the global coalition fighting ISIS resigned in protest over president. Trump's abrupt decision to withdraw US troops from Syria. Macur joins Defense Secretary Gimenez in an administration exodus of experienced national security figures. Fox's Jillian Turner Mattis. Other top military brass believe withdrawal is a betrayal of the Kurds in Syria Syrian democratic forces US military leaders believe they'll be left for slaughter after the US"