Is it Ever Right to Hate?

Not so much a blog post, more a quick question for Monday morning: is it ever right to hate? I spent a little time yesterday catching up with some of my favourite (and not-so-favourite) blogs. Many were Christian, not a few were Catholic. One or two surprised me, perhaps troubled me might be a better word, with their vehemence about people or things they objected to. I don’t doubt the conviction or sincerity of the writers, but even when I agreed with their opinions, I sometimes felt very uncomfortable about the way in which they were expressing themselves. It is a challenge for every blogger. No one wants to read  dull or bland prose, but being passionate about something isn’t necessarily the measure of truth or persuasiveness. Do we need to be more careful how we express ourselves, or is it all right to hate? What do you think?