Oh, I dunno...it felt pretty "slam right-wing" to me. Or, at least, Bush and Cheney-era right wing. If you're a huge fan, let's say, of Bush and Cheney politics, you may find the main bad guy in the book too cartoonish. If, however, you think Cheney WAS a cartoon, then you'll enjoy the villain immensely.
Well, I was not a big fan of Bush Jr's second term for sure and I was never a big fan of Cheney. Course, I'm really not a big fan of most of Obama's administration either. In any case, perhaps I'm forgetting some aspect to the book, but what exactly was anti-right wing?
Maybe you have to be a liberal to notice it.
But the main bad guy, Big Jim Rennie, is basically a liberal's view of a typical Republican leader. He hates the current president because he thinks he's Muslim, he hates government interference in people's lives but seems to have no problem being a lying, stealing, businessman. He eats too much and would resent some government person telling him what he's allowed to eat. He convinces people of his good intentions not by logic but by emotion, by using popular canned slogans about family values and America and power of the people, just to distract them from how evil he is. He uses fear tactics to create mobs.
All of that sort of thing. His entire character is a liberal's nightmare of a Republican. That's why I say the whole book is a political commentary.