Should be removed because it's entirely the brainchild of a bunch of trolls, and that is it's only purpose, to troll people. And it opens up the gate for every other insecure idiot to start parading around with their own country's flag as a panacea for their own failures. We already have a few turks spouting off their religious supremacy bullshit on the mod, you'd think that would be enough.
To be fair though, there are already flags representing a few other countries, like the Fleur de Lys or the Imperial 2 headed Eagle, but not modern day flags. Maybe make a fictionalized equivalent of the USA flag? Call it United Kingdoms of Calradia or something, replace stars with...I dunno, axes? swords? eagles? Something reminiscent of medieval heraldry. I don't know about the bars, I guess leave them as is or again, try to incorporate them in a more heraldric fashion.