willsmadam You say he was speaking a fundamental truth but then you go on to suggest that many young people joining the armed forces are unaware of what they are signing up for. I agree with you but Trump reportedly said the opposite - "He knew what he was signing up for".
Trump, other presidents and high profile politicians, and many other "middle class" Americans were able, on all manner of health grounds, to resist being drafted. In my view, he and they, should feel pretty uncomfortable making any comment or offering any sort of commiserations in the first place.
Much as I dislike Trump and his view of the world, the suggestion that it would be preferable if he could be assassinated is, I feel, quite wrong. Apart from the fact that it would be an illegal act of murder, it could quite easily spark internal violence and even a civil war, which could draw other regions of the world into the ensuing mess.