Poor Captain!
Might there have been a heated political debate in the cockpit prior to the Captains exit -for a breath of fresh air perhaps when the cockpit got too hot??
CNN witness quoting Captain mentioning “terrorism associated with Israel,Iran,Afghan” might point to the FO having one of these origins perhaps and there might have been a political debate going on in the cockpit. Bearing in mind that inside an American (USA and Canadian) airliner cabin mere MENTION of the word terrorist or worse a discussion of it will cause already paranoid people on-board to trigger an aggressive reaction (fight or flight response) which may have caused the already worked up Captain, barred from entry into HIS office to react in a less than civil manner..situation that is compounded by aggressive feedback from hypersensitive and paranoid passengers. We may not know the exact words uttered by the captain nor his body language before he was bounced by those heavy weight passengers.
Another point worth querying is..if a company pilot was in the cockpit (assuming after the incident and not whilst the Capt was in the toilet...CVR will expand on this) why didn’t he take over as Captain as is the normal rule with regards to Captain incapacitation SOP world wide and have the FO assist?May be he was also FO, may be he was not Type qualified?It would make more sense if the "relief Captain" boarded the cockpit on the ground to help with shut down and security checks or Voyage reporting.After such an incident I imagine the relief Captain would have to be well known to the crew to be allowed in...as a crew ID can be faked.
He is a colleague guys.Let us be gentlemen and give him the benefit of the doubt till proven guilty.I am sure justice will run its course.I pray if he was innocent to redeem himself after a proper investigation and fair hearing.