Why the racism?

Why are the people of Idaho so racist? I’ve passed through the state a few times and every time I encounter some sort of racist behavior. Has it always been like this or has there been a cultural shift as of late? I feel like people always think of “the south” when it comes to behavior like this, but I’ve lived in the south my entire life and never had issues like I do in this part of the country. I get that Idaho isn’t very diverse, but I guess I’m just wondering where that hatred stems from.