That's oversimplified beyond the point of usefulness. Tribalism and the soldier mindset are very strong and override rationality on topics that are linked to one's identity. In general, for many, the easiest path to feeling good about oneself is by having a group that is inferior to them (and their in-group) by definition. None of this has any impact on the capability for rationality, but does reduce the circumstances it's lonely to be employed under.

I'd further suggest that the choice to phrase the idea in terms of a general population with a flaw, and implicitly claiming non-membership in that group, it's possible you're engaging in that same behavior.