I do not believe that God has anything to do with what sigil any country or tribe chooses. This has been a practice since the dawn of man. To identify and separate one tribe from another. Scots have different tartan patterns to identify different clans. Native Americans had different banners to identify their Nations, and this included decorations, head dressing, and color schemes. Nations have developed this practice, as well.
Ease up on this. There is so much more to practicing Christian doctrines than attempting to dissect and define prophesy. A lot of time and energy is being wasted debating prophesy on this board, and it's kind of scary that this is the focus rather than The Word.