Agreed, putting 2 confrontational groups together is a bad idea, that is on the judge who in the end issued the permits.  The Charlotesville PD screwed up on a bunch of fronts as well.  A local synagogue that was on the Nazi parade route asked for a police presence, they were denied.  While nothing happened, they have video of 3 guys in Nazi armbands standing outside the synagogue, carrying long guns.  That is not a recipe for those in the synagogue to feel safe and could have led to trouble as well.