Could someone please explain to me what you're talking about.
FWIW standard practice is not to "delete" messages; We have a private (non-public) message board where we move stuff deemed inappropriate, allowing all forum staff to see what was done; It also allows staffers to discuss actions that were taken. OTOH occasionally, for one reason or another, a staffer will delete one or more messages; Such messages are gone for good, and can't be reviewed/discussed.
I just looked at the forum moderation log that records all moderator actions, and also looked at the private message board where we move stuff that's deemed to be inappropriate, and I'm not seeing "30-40 comments that summarily got deleted". I do see one or more deletions from the 7 day winter road trip topic, but have no information on that action.