I believe most States in the US draw the line at "(directly) inciting violence" or "creating a disaster" (eg. shouting "Fire!" In a crowded theatre).
For whatever reasons, shouting "white power" and "Jews will not replace us" while waving swastika flags is not considered "inciting violence" in the US, even though the implications are very clear to everyone. This has allowed Nazis to march in the streets for decades in the US.