I don't think "component" means what you think it means.

Perhaps you mean "counterpart". But the antifas and other counterprotester elements are far more numerous and active than the neo-Nazi-alikes. The latter had Charlottesville, then the former discredited the claim that the latter were responsible for the violence there by following up with Boston, Berkeley, Seattle, etc. in the following weeks with no one remotely "Nazi' as opposition.

And they don't "cause both left and right demonstrations to go bust" in remotely the same way. Beat downs on non-Nazi "Nazis" and discrediting your co-demonstraters by doing so is not remotely the same thing.

(contd.)