Sure. If you read Enlightenment Now you'll find several chapters devoted to how many of the horrors of the 20th century can be traced back to ideologies which subsume the individual into groupings involving some subset of ethnic group, nationality, and social class. They are doubly dangerous if they are then paired with utopian ideals. Because if the ends justify the means, and the ends are a perfect good, you can rationalize ay horror.

You can find similar points of view in many previous writers from points as distant in the ideological spectrum as George Orwell and Ayn Rand.