We have symbols as well like Pepe. Symbolism feels a bit of a vague description if using it neutrally. Their form of symbolism is in the negative tense.

Take one example: Destroying statues.

They're not using symbols just as expression but reading too much into them, using them to express things that are inflated and putting more value into them then there really is.

I think their symbolism is also linked to their tokenism quite often.

I think in this particular image it's how seriously they take themselves. If you take scenes such as crowds doing the nazi salute or muslims curled up in prayer it's even more extreme than that.

I guess out there somewhere there are studies of symbolism. The left also consider their symbols powerful. The right consider their symbols meaningful. Roughly speaking.