The Inspector General recorded Priestap’s explanation in the official review. The OIG then wrote that it did not identify any Department or FBI policy that applied to the defensive-briefing choice and “determined that the decision was a judgment call that Department and FBI policy leaves to the discretion of FBI officials.”
That is the record. He said he thought about briefing the campaign. He said he decided not to, because a briefing might change tactics or produce a cover-up. The Inspector General did not convert that judgment into a crime. The Inspector General did not find a policy that required the briefing.
Commentary that he “spied on a campaign” by skipping a briefing is opinion. The quote is fact. Keep them apart.