When is a generalization about a group racist?

I had this question posed to me yesterday. I couldn't come up with a great answer but John Piper did! Below is an excerpt from an article on racism, stereotypes, and generalizations. Check out the whole article here.

When is a generalization about a group racist? I am using the word racist as something sinful, and the following answers move toward a definition. The following uses of generalization would be wrong (racist):

• When you want a person to fit a negative generalization that you have formed about a group (even if the generalization statistically is true).
• When you assume that a statistically true negative generalization is true of a particular person in the face of individual evidence to the contrary.
• When you treat all the members of a group as if all must be characterized by a negative generalization.
• When you speak disparagingly of an entire group on the basis of a negative generalization without any regard for those in the group who don’t fit the generalization. Or: When you speak negatively of a group based on a generalization without giving any evidence that you acknowledge and appreciate the exceptions. (I assume that Jesus’ generalizations about the Pharisees [Matthew 23] and Paul’s generalization about the Cretans [Titus 1:12] are not sinful because they did have such regard and did appreciate the exceptions.)

Implication for Christians: While realizing that life is not livable without generalizations, be careful not to let your pride lead you to use statistical generalizations in unloving ways.

Pastors are poor repenters. Ironic isn't it? The men who call people to geniune repentance weekly, often fail to deeply repent themselves.

This week I had some of my personal property violated. In my anger, I formed generalizations that led to racist thoughts and complete bitterness. This wasn't towards a people group of a different ethnicity. No, it was towards a people group that are near the low end of the social and economic scale often by their own choice and actions. They need discipline, yes. And yes, I must protect my family, friends, and flock as well.

But....

They don't need me to be racist. That is sin. I don't want to be bitter. I don't want to dishonor God or the gospel. I repent and trust the gospel. They need me to speak the gospel, live the gospel, and keep the gospel at the center of my heart and actions.