Who ate it
This comment was deleted by the system, because several ordinary users flagged it as offensive. Mods can always undelete comments that any other mods deleted. But comments deleted by ordinary users can't be undeleted by anyone. (Though mods can view such comments.)
quoted from a Comment by @Michael Hampton (thank you!) to correct my error.
being about religion was deemed potentially contentious.
is there any logging
Yes, though deleted Comments are not 'recoverable' by users other than mods.
or is it just down the memory hole
No, it has been recovered and (with some modification) incorporated into an A.