Hahahahaha!

"Why aren't there any Mexicans on Star Trek?"

"Well, that's a highly debatable assumption. First, one only sees a small fraction of the Terran population on the show, so there is no reason to assume that any ethnic group is unrepresented in that vision of the future. Secondly, there have been several notable characters played by actors of Hispanic descent. Recently, these include Robert Beltran (Chakotay) and Roxann Dawson (B'Elanna Torres). Interestingly enough, Dawson seems to have changed her last name from Caballero, perhaps in order to reduce the risk of being typecast because of her ethnicity. Star Trek in general seems to be very progressive with respect to using diverse casts, as evidenced by the first interracial kiss on The Original Series, and the introduction of Chekov during the height of the Cold War."