Thanks people, you've made me feel a bit better about things.
For one thing, having done a little research I've found the stories behind a couple of the references in the original article.
I found a video of Andrew Breitbart shouting at the protesters. I didn't realise he was shouting at the Occupy protesters, who were quite verbose in response. It's not as though he was shouting at little old ladies straight out of church. It was also curious to hear him change his cry at one point from "Stop raping people!" to "Stop raping the people!" Adding "the" gives the statement a slightly different cast. Having said that, his behaviour was bizarre and over the top, and it doesn't surprise me he died of a heart attack at in his 40s.
As for the Allen West statement about card-carrying Communists in Congress, I understand he was talking about members of the Congressional Progressive Caucus, so an identifiable group of people rather than some secret cabal. Having said that, I had a look at the policies the caucus advocates, and in the context of life in the USA I think I'd support every one of them. In fact most have already been adopted here in Australia, which I think most Americans recognise is not exactly a hot-bed of radical socialism.
So it looks at though the author of the article put the most sinister possible spin on what he described, although there was at least some reality behind it.