There are certainly things I don't like about this like letting someone run over people blocking a road, meddling in local budgets, or giving special protections to Confederate monuments.
But I fail to see how this violates the 1st Amendment in any way. Destroying property, assaulting people, and blocking public roads have never been protected as "speech" and that is what is given more severe penalties by the "aggravated riot" distinction.
Maybe I'm missing something since almost all the news articles I can find about this just quote a bunch of people telling you how bad it is instead of telling you what it actually does.
There’s more to the bill than that.