The colonel told it [the parrot] to shut up (18)
You get the feeling that nobody gets to speak unless the colonel signs a permission slip first. A parrot speaks out, though, and in English yet. You don't hear him saying hola, do you? Given the colonel's mood at the time, he orders the bird to shut it.
I am tired of fooling around he said. As for the rights of anyone, tell your people they can go fuck themselves. (26-27)
No more Mr. Nice Guy. The colonel drops his polite act and lays it out for his guests. You don't want to push this guy too far. If he's capable of such terrible acts when he's "fooling around," you don't want to see him get all serious and put on his big-man-pants. In case his guests might have any illusions about human rights, the colonel tells them where they can go.