Well does a politician has to execute what the people want? It is an intersting question before you can make an argument. Voters are simply not smart or informed enough to make such decisions. I don't even think it is fair to expect it from them. However we should expect from politicians to be above that. They should guide the population to a better country for everyone. So the question is, will the (future) people of the USA be better off after Trump? I don't think it is. If a politician can't even keep control of his staff, how is he going to keep control of his country? I also feel he is seperate from the other powers in the political world. He looks at a distance and the posts a tweet about it when it is over. I'm no USA state citizen but that can't be healthy. Executive, legislative and judicial need to work together to get things done right. My friends had a nice name for him. He is a 'café' politician, the man that you see at a bar at friday night that says: 'if I were president, everything would be so much better' while knowing nothing of politics. Normally you don't take such guys serious but that was unfortunately a mistake.
The mistake was not in believing he was going to be a bad president. It was in ignoring his loyal supporters. Just because Trump is a bad politician does not mean you have to ignore his voters however. His election is a clear indication that the American population wants something or there is an underlying issue at least. If I had to make a guess and we have to look at international politics for a moment. I think people lost their faifth in politics. It's something you see across the board and it is worrying. But back on track so now it is important now to learn from this mistake, clean house and earn back the trust of the people. Trump ain't going to do it. In fact I expect him to go to the trash can while sweeping.
So no I don't think that people have to support trump for the sake of unity. Or support Trump because he is elected. Right now he is elected around 6~7 months which is 12.5% of the time period he has and the white house is still a mess. Now it is tilme to say 'enough is enough' and 'throw him out'.