Yes, those are social constructs. Except the fist, as a fist is a physical object. Consequences for cosplaying a Nazi are social constructs though.

What isn’t a social construct is food, and needing to eat it, as an example. I would then say that food has inherent value to humans. It is worth something to you no matter the society.

Something being a social construct doesn’t make it not real. It simply means it’s not based in physical reality, but in social reality.