Many of the killed comments seem innocuous on the surface, so these examples do make me wonder what criteria were used. (Is something other than the comment a factor, such as evidence of contemporaneous voting manipulation or sockpuppet accounts?)

Still, I wonder why you started so coy with specifics. (Examples only came 5-replies-deep.) Why not just ask politely, as the original commenter, "excuse me, I don't understand, why was this comment killed?"

The editors may still decline to comment but at least then you wouldn't seem kind of shifty and potentially the same person as other spam/crank posters.