Flag-waving is a time-honored political tradition. In our culture, we create flags as a symbol, to represent what we stand for, and what we believe.
With certain political campaigns, some symbols are intended to enlist the support of certain groups. They were intended to say, we're part of your group. Vote for us.
Some of the symbols represent rather a special focus.
To which flag do you pledge your allegiance? I know which flag commands my respect today. It has little to do with political interests.