You have NO idea, whatsoever, what a "Third World" nation is actually like and America is not now and shall NOT soon turn into one.
Do you live in a slum now?
As for Third World countries, you have obviously not been to large swaths of American cities from Los Angeles to Houston, as well as beyond the Border states, where most of the business signs are in Spanish and the ambiance is more that of Guadalajara or Juarez than anywhere in the United States. Perhaps where you live this transition has not happened. If you are lucky, you may spend the rest of your days in some pocket of old America. Others, especially in the Southwest, are not so fortunate.
A major effect of the illegal alien amnesty in 1986 was to place several million Mexicans on the path to U.S. citizenship. These newly minted voters have permanently moved California into the liberal column. Before the 1990s, the state was moderate to conservative politically. Now it is one of the most liberal states in America. Do we really want to see this happen in other states and ensure a permanent Democratic majority in our country?