They think he hates Mexicans and therefore all latinos.
Believe me, many of them are on my FB. They are constantly posting vile crap on Trump. Then they all post mockery and nasty stuff in spanish in the comments. I know enough spanish to know it’s not pretty.
My DIL is very very sweet, and she never posts anything political but her family... OYE. I don’t think they care much for Cruz either but I don’t see that on FB. My guess would be Rubio is favored and another guess would be that turnout will be low because they really don’t like any of their choices.
A lot of their posts are Latino Pride kind of stuff too. Sort of like Jeremiah Wright stuff for hispanics.
One post last week was promoting U.S to bail out poor little PuertoRico because “they” actually built our nation (???) We owe them.