You have to ask yourself why did people vote for Trump?
I think one big contributor (as with many populist politicians) is a sense of grievance. That may or may not be a justified grievance, but that is irrelevant to the person who has the grievance. The grievance might be a feeling of being left behind. Of historically being higher up in the pecking order but now (whether true or not) falling behind other communities or ethnicities in your country. Then in the States abortion (pro and anti), religion and guns are far more important than they are here. Anything that challenges those values (feminism, atheism, calls for gun control) fuel the sense of grievance.
And once there’s a grievance there’s a desire for revenge. Where someone has done you wrong it would be revenge against that person. But that isn’t possible when you’re talking about a country. So it focuses on groups of people or, these days, a culture. So in the States, the “enemy” of the Trump supporters are the liberals, feminists, homosexuals, media, the “elite” and the “deep state” etc.
And Trump (like many populist politicians) has tapped into that sense grievance and that desire for revenge. He knows achieving revenge against the groups his supporters perceive as being responsible for all their woes, is more important for those supporters than actually improving their lives economically.
In short, provided he can find an enemy and attack that enemy, he’ll be doing precisely what his supporters crave. Now you and I might think it’s bonkers to support him, but clearly he’s hit a rich seam. People really do enjoy a good hate.