Because they used millions of dollars of American citizens’ tax revenue to make a meaningless edgelord gesture, amongst a myriad of other reasons why it’s a bizarre and childish thing to do. Stopping there because this isn’t Reddit
It’s not meaningless; it’s a way for them to immediately prove that the person speaking has been intimidated enough by them to acquiesce to this absurdity. If they don’t, they can be punished just for refusing. If they do, they’re already back on their heels proving their willingness to cave on anything else.
