Yeah, I heard similar things. I don't think it had anything to do with politics though. They just tried to demoralize him. Besiktas fans did the same thing to former Besiktas player Alpay when he transfered to Fenerbahce
On the other hand, all Fenerbahce fans supported him. 1500 Fenerbahce fans versus 25000 Besiktas fans, of course it didn't work
As long as we play in Kadikoy he won't get any mistreatment from the fans
But when we play away games, unfortunately the same thing will happen.