I had flipped the thread, so came into it in the middle of a discussion of why Trump developed such a large following of voters that he was elected. If you ask me, it was (and still is) bcause a lot of people in the US felt dissatisfied with their lot. The prevailing ethos in the States is one of competition, of winners and losers.
It shows most clearly in the preoccupation with money - the first thing a lot of successful US people do in a social setting is to let everyone know their financial status. At a wedding in my extended family, for instance, one friend of the bride was from the States, and spent the entire wedding meal telling everyone within hearing distance how much she earned and how much her home, car, and the clothes she was wearing had cost.
However it is also there in other areas of life. It is those who win, win, win who are lauded, Those who didn't win didn't try hard enough, are lazy, were being paid by someone to lose the game. If someone gets no promotion after years of hard work, it is because they don't deserve a better job. If someone is disabled, they are not valued because they are not economically active. If they are old and slow, they are getting in the way of the young and agile.
All this competition to win means that there are far more losers than winners, and they are sore losers. They were a pushover for someone who claimed that they were being institutionally victimised and cheated by the government.
The posts on Facebook by Trump supporters are mostly by people of low levels of education and achievement who resent the "winners" who have become rich and who they think have now got their comeuppance from the Trusk duo by being "found out" stealing from the state - and thus from the public. They have found their heroes and they taunt as "whining losers" those who don't see them as heroes and instead point out their flaws and warn of the need to be watchful.