Donald Trump has no core ideology. At root he is a populist, meaning he follows whatever is popular among his base. This is why the establishment from both the Democrat and Republican parties despise Trump—because his loyalty is not to them and their corporate donors, but to the populace. They don't hate Trump because he's a racist or a sexist or a fascist; they hate him because he's a populist.
It is all the more ironic and contradictory that people would try to frame Trump as anti-democratic or a threat to democracy—because populism is the purest form of democracy. It is literally the will of the people. Or as Trump would say, "I am the most democratic president ever. Nobody loves democracy more than me."
The easiest way to understand leftist psychology is through the concept of projection. They project their own darkest desires onto others. They call Trump an authoritarian threat to democracy because if they had the power of the presidency, they would use it to crush their enemies (as the Biden regime did through their lawfare against Trump), therefore they assume Trump will do the same to them when in power.
Another key to understanding leftists is that their institutions do the opposite of what they purport to do in name. "Progressives" actually regress society. "Diversity" results in everyone thinking and behaving the same. "Anti-racists" are racist toward white people. "Anti-fascists" use violence to intimidate others. "Democrats" hate democracy and want to replace it with a managerial bureaucracy.
Those who decry "populism" and call Trump anti-democratic are entrenched in the established order. They fear Trump because they fear true democracy—the will of the people disrupting the establishment to strip corrupt elites and deep state bureaucrats of their power and return it to the populace. Nobody hates true democracy more than the most vocal supporters of theoretical "Democracy." All Democrats are DINOs, democratic in name only. The last thing they want to do is give power to the people. Because they might elect somebody like Trump...