Donald Trump's past plays a key role in forming the person whom he is today. It drives the ways in which he comports himself, interacts with people and views the world in which we live.
Donald Trump is a fine example of the saying that, with rare exception, whom one is by the time one is about five, or ten or something around those ages, defines the core of whom one will be, what one's character will be, for the rest of one's life. Trump was a bellicose hooligan who chose "all the wrong ways" to gain approbation from his peers and/or superiors as a child, and at 70, he's no different. But for the fact that he has never been not wealthy -- a state of being that inspires social climbers to inure themselves to him -- he is nothing but social climber, that is, he's a charlatan who purposefully palters so as to gain acceptance among members of social cohorts that he construes as the ones into which he'd like to be welcomed.
For instance, though owning and operating golf/country clubs is profitable, the fact remains that Trump entered that line of business because he couldn't get admitted to the one's to which he sought membership. His doing so was little other than an act of vengeance and retaliation. He had the wealth to join, but he lacked the good character that one must have to join the clubs he wanted to join. Trump's country clubs are nice, but, seriously, nobody who gains admittance to the one's Trump could not would choose to join his club instead. (Obviously, some people belong to multiple clubs, but that's a different matter.)
Why? Because membership in Donald's clubs, as with all his organizations and endeavors, is purely transactional. With regard to his clubs, if one has the money, one can join. That is the beginning and end of commonality necessarily to join a Trump club. For one who have the money, what is the point of that being all one can be assured of having in common with most or all other members? Everyone with that kind of money is well aware that there are plenty of similarly situated individuals with whom they'd just as soon never cross paths, much less do so in what is supposed to be a relaxing setting.