You know how people say that mushrooms are only the most visible part of a much larger and mostly invisible mycellium network?
This is a metaphor.
Uniforms like this are an indicator that when you look at the fascists wearing them, you're seeing the visible part of a much larger and mostly invisible network of logistics, support and money.
You should not trust people who wear uniforms. But you should certainly not trust those who provided them those uniforms.