I feel like you are overthinking it. There's a segment of the population that share a set of values, they are collectively more active than average in imposing their worldview on the rest, and they've had a strong momentum towards their goals for a while.

They are labeled MAGA, and they are as real as any widespread social movement could be. If your point is that social movements don't really exist as a "material" entity, then we are just arguing semantics.