Very interesting stuff, but I think it was somewhat undermined at the end with that 'We'd kill every chimp in the world' speech. The way to get the message across that these people are a bunch of idiotic nutjobs isn't to become a nutjob yourself.
Also, I am failry sure that the ALF sub-humans who were daubing 'Vegan Rights' over the walls forefited all of their rights as human beings when they decided to firebomb the workplaces, homes and cars of reserchers because that's called attempted murder.