For example, suppose a person doesn't want to become a linguistic or religious minority in their own country. When they logically oppose immigration, do you decide that you're hearing a dogwhistle for white supremacy? If so, you're discarding what was actually said and you're substituting false data that supports a pre-determined conclusion that Trump supporters are racist.
Another factor is that there has been some truly shocking projection and gaslighting with regard to corruption. Like no other president, Trump has fought corruption, yet he is relentlessly accused of it. The claim that Obama had a "scandal-free presidency" is a cruel joke; his abuse of the intelligence apparatus to target a political opponent made Nixon look saintly. Biden's family has gotten rich off of foreign influence; we have the evidence and there is no alternative explanation. The whole impeachment process started because both Biden and Pelosi had children collecting bribes from Ukranian gas companies, and Trump dared to tell the Ukraine that prosecuting the corrupt was proper. Looking back to Hillary, her actions with classified information would have put any normal person in prison for decades. The contrast with Trump is stunning. For years everybody has investigated Trump in hope of finding something, and everybody has failed.
The desire to put America first is real, legitimate, and proper. It's a job requirement for the president.
Cutting regulations shot the economy to record highs before that virus hit. Inequality actually dropped. Black and hispanic unemployment was the lowest recorded ever, with records going back over half a century. Trump knew what business needed, and he delivered.
Why do you imagine that "he doesn't care about the damage he does"? He is only damaging things that need to be damaged, like the choking bureaucracy. He cares, and he did the damage on purpose, because the damage was needed. If by "damage" you're referring to something like the opinions of the leftist leaders of parasitic countries, yeah he doesn't care and he shouldn't care. The job is to put America first, not to please foreigners.