Now this, ART, really IS fear-mongering!
Yes, the number of minorities is growing. Large numbers of minorities work in low-paying jobs and do the work middle-class Whites abhor. And yes, the minorities hold on to their culture in many ways. BUT, what draws these minorities, as it has since our nation was founded, is the opportunity for a better life that this country offers.
By and large IMHO most immigrants love this country for the opportunity it has given them. Most immigrants I know, and I know many because I live in the only state (Hawaii) where minorities are the majority and the whites are the minority, are more grateful to be Americans than most of my caucasian friends who take their citizenship for granted and forget that unless you're Native American you're descended from immigrants yourself.
Just because an immigrant still speaks his/her native tongue and holds on to their native cultures, does not mean they are going to destroy "American culture." The Italians, Poles, Russians, Greeks etc. did the same thing when they arrived on these shores and continue to do so, but I don't hear anyone sending out the alarm bells because of them. Hmmm, could it possibly be because they're WHITE?
And good grief, American culture is a hodge-podge of immigrant cultures anyway.
I find it ironic that "White" Americans, whose ancestors were immigrants to begin with and came here in search of the American Dream, feel threatened by Hispanic and Asian immigrants looking for the same opportunities.