What is the point of your blog? I mean, on some level, it's a place to put things that you write. But who is your primary audience? It it first your friends? Possible employers? General people you don't know? I mean, this may change a bit from entry to entry, over time, etc.... Are you trying to get a job? Share your experiences? Change the world?

You have no obligation to be fair, or foster free speech, or anything like that on your blog. Unless that's the point of your blog. You have an obligation (I mean, sort of. I guess. If you have an obligation at all, which is sort of up for debate) to pick an audience, pick a goal or handful of goals for your blog, and then try to figure out how to best accomplish those choices.