From libertarian Michael A. LaFerrara at Principled Perspectives:
I define collectivism as the idea that the primary focus of moral concern is the group. This leads to the kind of dehumanizing generalization discussed in the article. I define individualism as the idea that the primary focus of moral concern is the individual. This leads people to evaluate others according to individual character rather some racial, economic, or other group association. (It is important to note that collectivism does not mean teamwork and cooperation, and individualism does not mean lone wolfism.) We need to understand explicitly that collectivism leads to sweeping generalizations like “girls can be mean” or “boys will be boys,” and that individualism leads to the mindset that no individual represents every person in a demographic.
Unfortunately, collectivism is being promoted in the name of inclusion. The diversity campaigns promote the idea that racial or cultural heritage matters in judging people.