If you came to this country with the hope of making a better life for yourself, and believe that democracy, despite it's shortcomings, is the best system possible, it is time for you to stand up and make some noise.
This is a country where people come to by choice. There isn't a brand of human being on the planet that can't be found in the United States Of America, and we like it that way. I like it that way.
The only thing that we demand is that you follow the law and pledge allegiance to the flag, of the United States Of America, and to the republic for which it stands, one nation, under God, with liberty and justice for all.
In my own family, if you count up flags of nations abandoned for the USA, you would count 4 of them. I am the first generation in my family that is American born on my father's side, and second on my mother's. That means I grew up listening to the stories of how and why this came to be, and has given me an appreciation of the sacrifices made to get here so that I would be able to lead a life of my own choosing.
If it came to pass that any misguided newcomers from one of those four countries started insisting on waving a flag other than Old Glory, I would be on them like a duck on a June bug (ducks really like June bugs). I would explain that there is a difference between contributing some of your heritage to our melting pot, and celebrating a foreign nation. Flags represent nations. The only flag around here is the American Flag.
So get up and stand up for America, before the misguided newcomers from your neck of the woods ruin it for you and the rest of us.