Because Rohani has none ? 

Western Hypocrisy

The only reason they hate Erdogan is because they don't want Turkey as part of Europe 

and because the West needs to Kurds to fight ISIS 

IT all started under Obama who needed to bad mouth Ergodan because Turkey wanted to support the Secular Free Syrian Army but that went against Obama's Iran Agenda 

But it was enough to make criticisms of Erdogan mainstream thanks to the same lobbies and the NY Times so called "Middle East Experts"