Calling retired Marine General John Kelly “dumb” and a “lowlife,” Donald Trump on Wednesday unleashed a social media tirade aimed at his former chief of staff, who in a series of articles this week revealed startling details of the former president’s inner thoughts – which Trump blamed on “pure Trump Derangement Syndrome Hatred.” “Thank you for your support against a total degenerate named John Kelly, who made up a story out of pure Trump Derangement Syndrome Hatred! This guy had two qualities, which don’t work well together. He was tough and dumb. The problem is his toughness morphed into wea…