When the cable news people talk about how the wingnuts are behaving basically the same as the left did during the Bush years, it's an absurdly false equivalence on its face.
And looking at extreme opposition, there's evidence that right wing extremism has far exceeded anything seen on the far left during the Bush years. Specifically, threats against President Obama are "up 400 percent from those against his White House predecessor." Does this indicate that there was a similar level of anti-Bush anger as there is against Obama?