I have a feeling there is more than what is being said publicly about all this. I'm thinking it's possible that it was at least in part Abidal's decision to go, but the club wants to look "in control" & that it couldn't be possible that a player is unsettled/wants to leave. If the club was being so disrespectful & throwing him out w/o even attempting to negotiate anything with him, why would he be so keen on wanting to return here after he retires? If I were Abidal, I would be mega pissed if that's what really happened.
Either way, it all still stinks to high heaven, whether what we see/hear is true or not. Makes the club look like a bunch of jerks who have no regard for legends.