You're over-stating the case.
Middle class Latinos, no question.
Lower class Latinos, not so much.
But you could say the same thing about Anglos...
Problem is, a disproportionate share of the Latino population is less than middle class.
We can change that. Lower class Anglos, at least those who haven't been brainwashed by the unions, are overwhelmingly conservative. They are almost as reliably conservative as the blacks are reliably Democratic Party voters -- in the 80-90% range.
You know why.