With the greatest respect I would attach no credence whatsoever to any reports by cabin crew on this matter. They don't have the technical expertise to understand the situation, they are unlikely to have been on the flight deck at the time and so rely on dumbed-down info from flight crew, chinese whispers and second hand gossip.
As for the character assasination of the captain in question, I suspect if this incident did occur in the bizarre and unlikely fashion claimed here then the captain is entirely free of blame. Having called 'rotate' one would question why the FO chose to reject the take off without the standard instruction being issued.