Wow, I don't know where to start, so I'll just post links to pages about logical fallacies that this guy committed:
Ad hominem: This is the biggest one. Even if all leftists are hysterical, this does not say anything regarding whether or not their claims are true; this article is attempting to disprove an argument entirely based on the form in which it is given, which is completely logically unsound.
Hasty generalization: Last I checked, there were around 18% of the population who were self-described liberals, which constitutes a little over fifty million people. The editorial makes it sound as if PETA (an organization with which just about
nobody agrees with - since when do most liberals support what PETA says?) and Randall Robinson make up 100% of the liberal population.
Spotlight: This is similar to the one above. The news is very, very seldom representative of any sizeable group at all, and when considering those who appear on the news, think about what gets you on the news when you're a political activist: you have to be the loudest, most obnoxious and imposing person out there or else coverage of you will not be interesting. If a liberal had well-thought out views that he casually presented at a debate, he's going to get no publicity whatsoever. Of course left-wing activists in the news are reactionary. So are right-wing activists in the news. This is not so much a function of one's political slant as it is a function of what the news likes to cover.
Straw man and
poisoning the well (two for the price of one!): I know we hate hearing the former from BRTD, but the fact of the matter is that it is honest-to-God applicable in this circumstance. It's not so much that this editorial is distorting the claim presented as it's that it's taking the claims of the most radical of the radical on the left and then acting as if every single person on the left agrees with these claims in lockstep. Refuting these claims is therefore taken to act as if the claims of anyone from the left have been refuted, even if there's a leftist who holds a different opinion. I throw in the second fallacy as a 2-for-1 deal because, in addition to attempting to refute the arguments of everyone from the left through refuting the most radical of the arguments, the editorial is also attempting to thereby delegitimize any argument coming from the left by making people think that being on the left implies that you agree with these claims.
I could go on, but I think it should be clear that this argument's composition is like Swiss cheese. I'll just finish with a simple statement. To reiterate what was said before, there are around fifty million people who are self-described liberals. Does it really seem plausible that
fifty million people would all be brainless automatons, all believing exactly the same thing, all acting in exactly the same way, all hating exactly the same people? Why does it suddenly seem completely okay to bundle fifty million people in one incredibly tight package, as long as we call them "liberals"?