It’s not rocket science…
…to say the beginning of Trump hatred came from the Clinton campaign. He was once feted in New York, even by liberals. How did it change from high regard to hated? One thing is clear, dislike was instant once Trump entered the race as a Republican, increased as he ran, and took a quantum leap forward when he won the election. To this day the hatred has grown on a level hardly thought possible.
https://www.americanthinker.com/articles/2020/05/on_trumphatred.html