Note the picture from the upper right: "We are not criminals".
Well, if they're illegally in this country, then yes, they are criminals. What's so hard to understand about this?
No, not all immigrants are criminals, and I do not oppose immigration. I do strongly oppose illegal immigration, and the idea of granting illegal aliens a path to citizenship that does not involve their going home again and doing it the proper way, as they should have in the first place, makes my blood boil, just as granting amnesty for any other crime does.
(And no, I didn't manually select that song; iTunes did that all by itself.)