The blog doesn't just "inform about political protest", it explicitly advocates for violence. Their primary motivation seems to be hate of the political right. As a leftist myself, I think that "leftist hateblog" is a pretty accurate description.
Do you consider the New York Times a “hateblog” for their endorsement of political violence against the former government of Iraq?
No, that's war mongering/yellow journalism by a mass media company, far worse and more destructive than a "hate blog"