I feel i should not be demonized for pointing out that such acts are wrong, and should not be celebrated, and further assert that such drawing of attention is not defacto support for white nationalism, or its ilk either.
Not demonized, no, but it does come off as somewhat petty and banal -- and evocative of the jobsworths who have always used "proper procedure" and "policy" and so on to justify why they needn't listen to the scruffy folks demanding that they stop being evil. Many of those were, in fact, supporters of the very oppressive systems they helped craft to enshrine the status quo behind a bastion of paperwork, which is part of why such nitpicking is unlikely to be well-received. If someone just wants to be righter about something than both sides and therefore feel superior to both, the law is a great place to look, but it's hardly relevant.
Yes, the rule of law is the bedrock of our society, but laws are and always will be imperfect; they are our best attempt to codify and regulate justice, which will always be to some degree ad hoc and subjective and gray. This is why we have judges and pardons and jury nullification and de minimis violations and malum prohibitum laws: to stop the rule of law from becoming a tyranny dispensed by automata, and to keep it being something worthy of the trust we put in it.
On the one side, we have imperfect and incomplete evidence that a piece of cloth was stolen and burned, together with the misuse of a public flagpole. On the other side,
racist facists are killing and hurting people with automobiles while emulating Nazis. This is, I think, one of those cases were taking a meticulous tally of vandals and ordinance violations is so far down the priority list that actually tasking the legal system with it would itself be unjust. Everyone involved has much, much better things to do.