“Are these postings from the supposedly an FBI guy on 4 chan?”
Yes.
From what I followed on the discussion thread, this guy knew too much. He was giving a blow by blow on events leading up to a decision by Comey. i.e. Internal agents were fuming over the Bill Clinton-Loretta Lynch plane meeting & how that was causing a sh*tstorm internally.
His nervousness of being caught & ramifications (assuming room temperature, etc).
Everything then was deleted. Now events are unfolding. What we are seeing in the news seems to be nothing like what may hit with the supposed massive leaks coming. Again - time will tell.
Are these postings from the supposedly an FBI guy on 4 chan?
Yes.
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Oy, 4chan - falls under the “fake BS punking by some kid” category by default.