Just adding some points:

-- Assad was always a darling of the West because: 1) He is a dentist (?), educated in Britain; 2) Has a beautiful wife; 3) At the begining of Syria's civil war, she was in London, buying expensive stuff to one of their several palaces; 4) Her only worry (the personal emails were published by the Guardian, at the time): "I hope this is not upseting you, dear"; I've just bought some nice furniture, etc.
-- I doubt that Mr. Trump knows exactly where Syria is, but: 1) Nothing better to stimulate the economy than a good war -- the bigger the better; 2) Following the "cathecism" of Emperor Constantin, you shall impose, by force, a unique "christian" faith in order to rule the world.
-- Mr. Trump is forgetting an old rule: never put yourself in the middle of a generalized civil war; and, by the way, were not napalm and agent orange chemical weapons?