Many of them say that this "invasion" is a conspiracy to alter the culture of the United States in a Hispanic direction.

Ironically, very few, if any, of these anti-invaders ever condemn what the U.S. government did with the Treaty of Guadalupe Hidalgo in 1848. That treaty did more to change the culture of the United States in a Mexican direction than immigrant "invaders" could ever hope to do.

With the Treaty of Guadalupe Hidalgo, the United States succeeded in stealing and absorbing the entire northern half of Mexico. Yes, you read that right — the entire northern half of Mexico, a country that had been part of the Spanish Empire for centuries before acquiring its independence in 1821.

Imagine if the United States were today to steal and absorb the entire northern half of what remains Mexico. Would that significantly alter the culture of the United States. I'd say, yes!

The Treaty of Guadalupe Hidalgo settled the Mexican War of 1846-1848. Prior to the war, the U.S. government had offered to purchase the northern half of Mexico, which consisted of what became known after the absorption of the states of New Mexico (Yes, NEW Mexico), Arizona, California, and parts of Colorado, Utah, Kansas, Oklahoma, and Wyoming.

Texas was a Mexican province in the northern half of the country. On March 2, 1836, Texas declared its independence from Mexico. On April 21, 1836, the Mexican army under Mexican president Antonio Lopez de Santa Anna was defeated by Sam Houston's army at the Battle of San Jacinto. The Mexican congress, however, never acceded to Texas's secession.