Donald Trump is a liar. He lies more than any politician in history. He's a literal fascist. I know a lot of people on the right like to call people on the left fascists because they don't like them. But Trump is the literal definition of a fascist, as are any number of people on the right... but especially Trump. He is a blatant racist. It is so blatant that it is not possible to pay attention to anything he says or does without knowing he's a racist, and anyone who says they don't believe that are flat out lying. I mean for fuck's sake, he is openly supported by the KKK and self-proclaimed Nazis, among other white supremacist groups. He is blatantly sexist, and what's more he's a serial rapist. If you say you don't believe that, you're lying. He attacks the free press, he calls anything negative they say about him "fake news" even if it's demonstrably true, while supporting any positive news about him that is demonstrably false. He appointed people to government positions that have been trying to destroy the agencies they were put in charge of for years before they were given those positions. He appointed many blatantly partisan judges, including to the Supreme Court (one of whom is also a rapist). He completely fucked up the response to the Covid-19 pandemic, leading to countless unnecessary deaths. He is opposed to any action to combat climate change, which could literally lead to the end of civilization as we know it, and enacted policies that are disastrous to the environment. He is homophobic, transphobic, Islamophobic, anti-Semitic, ableist, and basically bigoted in every way it is possible to be bigoted. He is hugely classist, as are virtually all politicians on the right, and is in favor of anything that will hurt poor people or the middle class, while cutting taxes for the ultra-rich. He praises foreign dictators while insulting America's allies. He openly asked Russia to interfere in the 2016 election. He has committed countless crimes throughout his life, before, during, and after his presidency, including literal treason. He incited an attempted insurrection. He falsely claimed the 2020 election was "stolen", while trying desperately to steal it, himself. The list of reasons to hate him goes on and on, there are more than I can think of at any one time, and probably more than I even know about. But any one of the things I've mentioned is enough to reasonably label him and his supporters deplorable.

The A to Z of Things Trump Could and Should Have Been Impeached For
A final response to the "Tell me why Trump is a fascist"
I Study Authoritarian Despots, and Trump Is Borrowing a Lot of Their Tactics
If You Tell Me You Are Supporting Trump, I Already Know Seven Things About You
I've spent 4+ years trying to understand Trump supporters. I'm all done now.
Lessons in Fascism
Why People Are Against Donald Trump? The Alphabet of Liberal “Hate”.