I count myself as both a Snapist and a Lupin-lover. It's pretty hard to say that one or other is right in scenes like these though; they both have character flaws, and they're both at fault.

Oh, goodness, yes! I like them both as characters, but Snape needs to be locked inside a research laboratory and never let out again while Remus needs to be given a job where he has no responsible to protect people from his own weaknesses.

At the very least, they need their heads knocked together in this book and in OotP.