Mark Schiefelbein/AP photo CNN’s Jake Tapper and others piled on President Donald Trump’s Department of Defense over a “NO MERCY” post on X that was hit with a brutal community note from the platform. In a post this week, Trump’s Department of Defense, which his administration refers to as the Department of War, put out a tweet with an image of a U.S. soldier and the message: “GIVE THE ENEMY NIGHTMARES.” “NO HESITATION. NO MERCY. OVERWHELMING LE…