Answer:
First off, America is composed to a large degree of immigrants. Other than Native Americans, everyone else in America pretty much got there via immigration. Having said that, I think that a lot of Americans have been resistant to those immigrants who enter the U.S. illegally, or those who are unwilling to acclimate to American culture. The United States is arguably unique in the world in many regards, including its Constitution, so I think many Americans value that very highly and don't take too kindly to folks coming in and diluting it or trying to change it.
Step-by-step explanation: