To me, it’s more about the goal he was trying to achieve. He clearly did it to taunt and insult. In that context, I can see how this should be a punishable offense (not death though).

It would be a similar thing if you had learned that the prime minister of Sweden likes to create art at home. Then buying one of his art pieces and burn it in front of his house. Sure, burning art is not a punishable offense, but the goal of intimidating someone with such a symbol could/should be.

I know you’re joking, but I still struggle to see how that makes things better? We have evidence that the Romans also committed genocide.