I don't see a problem. This was stolen from someone's property, the owner was threatened/harassed, then the flag was set on fire.
On the other hand, taking an American flag that one owns to a rally for which one has a permit and then burns it is manifestly a different operational sequence. That becomes protected speech under the protest permit that one receives for the rally.
So a guy steals a flag (value $20) then burns it where there is no danger to anything else or anyone....and that is worth 15 years in prison?
Meanwhile, in Portland, officers were ON SCENE when Antifa surrounded a man in his truck, used slingshots against the truck, then stole his thin-blue line flag and American flag and burned them. They were identified at the scene.
No arrests, and no jail time.
Both of these were politically motivated crimes with hugely dissimilar punishments. Where is equal protection under the law?
http://archive.bluelivesmatter.blue/antifa-portland-vandalizes-truck/