The point is that whatever people think of Cole, he's someone long earmarked for arriving at a top PL club one day and having an international career. Perhaps that looks less likely at the moment, but he needs to stay here and fight. 2 years ago he looked very good at W Ham with Zola and Clarke helping him, was linked to Liverpool, played for England etc
He's only in his mid-20's - he should be trying to get back there.
I'm all for players going abroad - I think J Cole has done the right thing going to Lille, but I know that European games aside the quality of football he'll play is going to be pretty poor. Great atmosphere yes, but he'll be training alongside lesser players and competing against lesser players and he'll suffer for it. There's the right time to go abroad - like Joe Cole has done, and the wrong time, like in this incident, or Michael Mancienne's case. Mancienne is going to really struggle to stay in the England picture now.
Is it true that Galatasaray aren't in the CL next season? Why would he do it then? He'd be better off getting promotion with the Hammers and finishing the season as top scorer in the Championship - that would go a long way to resurrecting his career.