This article is referring to hate crimes. And in this article Micheal Enright is imprisoned in jair for 9 1/2 years for attacking a cab driver. This man was a alcoholic for many years and as he was entering the cab he was also drunk. Micheal asked if the driver was Muslim and he responded with a yes. Because of this Micheal killed a innocent life. Its referred to hate crime because it discriminated a specific religion.
As for what was being discussed in class I believe that everyone has judgment in them. Because that's how the beginning of time was. Though we have evolved greatly from that time, those feelings still come in our human nature. Its something that is unstoppable.