It serves the same purpose that a thread reporting on an act of anti-Semitism would; it highlights that, recognizing that there are many factions within Judaism just as there are within Christianity, there is one faction in Judaism that acts out of a spirit of anti-Christian bigotry. These actions should be roundly condemned with the same fervor that acts of anti-Semitism are. Would you have us ignore acts of anti-Semitism by Christians because they would show all of Christianity in a bad light?
Lest I say something that is unjust, before I make any further response I would like to know if you think that this spitting is appropriate? My response will have to wait until tomorrow since I will be out for the rest of the evening.
No I do not (but then, I'm a modern American, not a member of an ancient religion in an ancient land). Neither do I think it worthy of a thread on Free Republic.
I hope you understand that I am a Theonomic positivist. If there is some Divine law that provides for spitting (which I've never heard of), then I'll have to change my answer.