questions from a stranger

I find the images of the American flags in front of the house really fascinating.
Has it been a tradition with you since the beginning of your country's history? in all regions?

Yes, you will find evidence of our patriotism and pride in all areas of the country. Some areas more so than others.
I have had the same question over the years from visitors from different parts of the world. I believe you will see more patriotic pride here in the USA because we had to fight to win our freedom.
Also, almost all of us are descendants of family that originally made the decision to come to America from other parts of the world. The decision was made for different reasons, but most reasons centered around freedom. My family has been here for almost 200 years.