Meh, it's the Guardian, they operate by providing a rose-tinted view of the world for liberal leftists. Dig deep in the article and find
I read that, but these things take time to settle in.
"liberal-leftists" seriously? Let's lift the discourse please.
But more of the time, people don't care about politicians' spats, especially when the method of revelation (hacking) lends itself to accusations of moral equivalence. I don't think liberal or leftist are derogatory terms, and I think they describe the Guardian's audience pretty well.