Have you heard of the political compass? The left and right are not essentially authoritarian or not, either can be either. https://www.politicalcompass.org/

Cogito ergo sum is not enough at all. The presence of other people matters, if you look at primatology you can see that it's not just indoctrination. So perhaps we should add Nos itaque sumus. "Made up" doesn't make things unreal, it just makes them changeable. The tangible isn't the only realm.

I agree that this author is far too self righteous, and ironically this is essentially and ideological diatribe.