::Ugh. It's not got anything to do with differing strong opinions. It has to do with using WP:BRD, WP:CONSENSUS, WP:OR, WP:3RR, WP:UNDUE, etc. when it suits him and ignoring them when it doesn't; the "bullying" remark was specifically related to the edit warring and ownership (ignoring BRD and CONSENSUS) he demonstrated at Head of state and (later) Governor-General of Australia. I could also add the tendentiousness and gross willful ignorance is a more passive aggressive form of bullying; a slow-building pressure that just wears his opponents down with head-banging frustration. 
 ::I swear, in the decade I've been editing at Wikipedia, I've never known someone with such a severe case of WP:IDIDNTHEARTHAT.