Soldiers placed great importance on the flag they would sacrifice their lives for. The devotion wasn’t merely emotional they were valuable morale builders. When you see the flag of what you stand for you know what you are defending and agreeing to the values that is behind that standard of the flag. When others see that flag they will either run to you or away from what it stands for if you are looking to be saved
The values that you hold to that makes your identity. Many have cultural identity,religious identity,even national identity as others look to see who you are. To make a decision if they want to participate with your identity. Even spiritually their many groups that do this based on their spiritual understanding. It doesn’t mean you are less than the others just a part of the whole.