American culture and way of life has to be protected.
Just to probe a bit... Should a culture or way of life that can be subjugated or even extinguished be protected? I propose that if a culture has strength within itself and loyalty to itself will persist. Without these two attributes, I question whether it should.
I find this interesting since the Americas culture was built on immigration, with diversity as it's main dominator. -Unless you mean the indigenous people's way of life?
I do not think immigration is the same as it was. I do not believe all who immigrate now actually want to be Americans.
American culture was built upon white European immigrants. Very different from Middle Eastern and Mexican culture, no?