I think the point is that you can paint almost every movement with many of these.

Orwell's essay on "What is Fascism?", and the latter part of Homage work to illustrate that these terms and similar are just used to paint an enemy and are bereft of meaning, so that Eco's definition is somewhat undefined isn't surprising, regardless of it's derivation.

I'd be interested to hear which you think can be attributed to Democrats.

Items 4, 10, 13, and 14 (at a minimum).