Unless you have some insider info as to what each individual player thinks (would love to hear this if it's the case?), what else can we go by than what is being reported in the media? If you seriously think the largest portion of the blame behind players rebelling lies at Gayles feet, I'd suggest that can seemingly be explained by the fact that the only players who have had trouble, are players who have had attitude problems in the past (or if they didn't, admitted they were in the wrong this time around...). In any case it seemed pretty clear to me by what we're hearing that Gibson has supported Gayles actions of late (this instance with Benn, along with calls for his batsmen to be more responsible, so it isn't a once off) and there seems no reason to suspect the players don't either.
Re: Gayles performances, sure he had a rubbish ODI series vs Australia, but despite not setting the world alight ,seems to have been playing better since then. In any case, given he's been a proven ODI & Test match performer in the past, and has been it seems incredibly harsh to play the "he doesn't contribute" card when using it as an example as to why players may not respect him. If they cannot respect him for what he has contributed as recent as his last test match, let alone his entire career (which has been comfortably more successful than a number of the other players put together...) then it seems quite obvious to me which party has the attitude problem.
FTR, just because I said I'm a neutral, it doesn't mean I don't follow what actually happens with the team.