Since I'm highly skeptical that there is such a thing as free will, it's usually very easy for me to feel sympathy for the ignorant. While Trump supporters are very disturbing, it doesn't help to judge them harshly. They are just like all of us, heavily influenced by our genetic and environmental backgrounds. That doesn't mean that they can't change when new environmental influences are offered to them, but it may be very difficult for someone who has always thought and believed one way to be open to new evidence or ideas. And, some people aren't intellectually capable of thinking outside the box, or being open to new ideas.
For example, I have one friend who is a Trump supporter. She is a rather caring nurse. She was raised in a conservative Christian home and I imagine her family or her friends have always been Republicans. She gets all her news from Fox, so she's never really been exposed to any more factual sources of news. She's smart and educated when it comes to things related to her profession. She's very caring and has a lot of empathy for her patients. So, I admire her positive traits and wish there was a way to help her be better informed regarding some other things. I'm just not sure at this point in her life, that such changes are even possible.
My brother in law, on the other hand has a doctorate degree in dentistry, so he's not ignorant when it comes to science. But, since he was a young child, he was obsessed with money, so he is a Trump supporter for one reason, "he put more money in my pocket" to quote him. He does have some positive traits. He raised and supported his two step children and employs both of them, despite being divorced from their mother. So, once again, I can admire his positive traits and despise his greediness, while realizing that he's had this trait since early childhood, assuming my husband is telling me the truth. Maybe his greed has made him ignorant of the many negative things that Trump is doing to the country. It's complicated.
While I try not to judge others, I am not always able to do so. There are times, when I want to scream at certain people, so sometimes I'm guilty of using sarcasm and humor to make a point to someone who appears to be very ignorant. I can have both sympathy and disgust towards some people. After all, I don't have anymore free will than the next person.

. ( And no, I don't want to enter into a discussion about free will. I'm just stating my own position on it )