Both you and @FlyingSquid are arguing the same point. The only difference is @FlyingSquid wants nobody arrested and you want to also arrest the Nazis.
First of all ACAB let it be known. However I think it’s more likely to get a local city council to allow for anyone using intimidating imagery, (defined by swastika and similar iconography) to be detained and removed from chambers. It’s been done elsewhere with great effect.
The issue is how to get it enforced because unfortunately, those that burn crosses are the same that join forces.