Is it because they lost the Mexican-American war?
Yes. And the Treaty of Hildago, in which Mexico was given $14 million dollars makes no difference to them Mexicans are taught from birth that we ‘’gringos’’ stole Mexico from them and it’s theirs and then have the right to come here anytime and any way they want to. And thanks to decades of liberals and their control of the academic system in America Marxist college professors have been only to happy to fill the heads of American born Latinos and stupid white kids with this bs through ‘’cultural studies’’ programs. Trump can only do what he can for know. In the end the Democrats will get back into power and it’s all over, we’re finished as a nation.