I can think of two ways to interpret this, and I'm not sure which one you intend:
1. They hold modernist views, that there is a distinct and meaningful direction/progression for how societies must change over time.
2. They don't know what postmodernism means, and consider it a generic bad-word to attach to things they don't like. (Comic example: [0])
[0] https://existentialcomics.com/comic/289
I can think of two ways to interpret this, and I'm not sure which one you intend:
1. They hold modernist views, that there is a distinct and meaningful direction/progression for how societies must change over time.
2. They don't know what postmodernism means, and consider it a generic bad-word to attach to things they don't like. (Comic example: [0])
[0] https://existentialcomics.com/comic/289