What question? I've re-read your post. There is no question. Are you thinking that "you may want to find out what you have in common with them" is a question? It appears to be a suggestion.
However, I'll accept it as an interrogative statement and provide an answer: I voted against Clinton with a vote for Trump. I'm Caucasian. I am prejudiced against blacks. The basis of my prejudice is bad experiences with black classmates when I was in junior high school. (I can provide details if you're interested.)
I'm aware of my prejudices and that they are based on past incidents. Consequently, when my prejudices rear their ugly little heads, I recognize them for what they are and can set them aside. This allows me to interact with blacks in the "here and now" as individuals who have no association with the persons involved in what happened in the past.
I'm just trying to be honest. If you have questions about what I've written here, I'd be happy to answer.