All that is "known" is that he rubbed his opposite number at Microsoft the wrong way. It looks like what the author of the memo wanted was a commitment from Apple not to bundle ClarisWorks, and Bereskin was the one who said no (possibly even the one who had the JOB to say no, because Steve at the time needed to be the good cop).
Well, I wouldn't think that someone doing his job and taking a contrary business position would be worth calling out as "a fool" in the introduction of the minutes of the meeting. It seems like a personal observation to rise to the level of attaching it to someone's name. Besides, anything policy/business-outcome related was kept to the rest of the memo.
