Trump rejected the idea of the visit because he feared his hair would become disheveled in the rain, and because he did not believe it important to honor American war dead, according to four people with firsthand knowledge of the discussion that day. In a conversation with senior staff members on the morning of the scheduled visit, Trump said, “Why should I go to that cemetery? It’s filled with losers.” In a separate conversation on the same trip, Trump referred to the more than 1,800 marines who lost their lives at Belleau Wood as “suckers” for getting killed.
Personally, I’ve come to believe that one of the things that all people who are Truly Bad People have in common is an inability to understand why a person would make a sacrifice based on principles such as duty to country or defense of democracy. It seems to me that Truly Bad People can only comprehend motivations based on greed or profit/power seeking motives. When a Truly Bad Person sees somebody deliberately put themselves in danger to defend their country they are only capable of perceiving that person as a sucker.
Trump and his family have had the means to avoid placing themselves in danger. Donald Trump sought and received four draft deferrments, one due to “bone spurs” in his ankles. And Donald Trump supposedly threatened to disown Donald Jr. if he joined the military, according to Mary Trump’s book (source)