ALL flags(standards/banners) are war symbols, declarations of intent to attack and of terrtory held by conquest, tribes,nations, and franchises alike.
Any attemp to float the idea of a world flag is a (hidden attempt) of a declaration of total war on all countrys simultaneously, which unfortunatly is too ridiculous to even get points on style.
Fashists always have some sort of fashion kink branding thing plus a cult of personality to get things going, but this one needs WAY too much explaining.