This answer can best be characterized as ironic. Irony is a rhetorical device in which what appears, on the surface, to be the case is very different from what is actually the case. In this example, the Sirian reacts very angrily to the notion of wars, and he seems very upset with the violence that is involved in human wars. The logical assumption for us to make is that he is a pacifist and hates violence. However, he reacts by saying he wants to crush a whole anthill of assassins. This shows that his reaction is in fact as violent as that of humans, which is ironic.
