In all seriousness it was probably just some aggressive 'tard looking for an excuse to be an asshole. Mr green hair was probably just virtue signalling in the first place so IMO they're both retarded for taking a stance on stupid bullshit
Although I don't really care about the debacle surrounding standing during national allegiance shit in the States, I support the patriotic American for doing something hilarious to a scrawny suburban white kid trying to be Mr. Special.