Ok. Seems there's not much evidence regarding his motivations.
Definitely anyone who got a photo taken with Erdogan was either not very switched on, or maybe switched on the wrong way. Same goes for Gundogan. But if either has made a careful public statement supporting Erdogan that would be much more damning.
In his statement it's implicit that he's backing away from support for Erdogan whether real or apparent, by saying he was honouring his nation not making a political gesture.