Nick Collison's got his teammate Enes Kanter's back and wants to make it perfectly clear -- Enes is definitely NOT a terrorist.
We got the Oklahoma City Thunder power forward out at Catch in Weho Friday night ... he tells us Kanter's an awesome dude and -- despite not knowing the full story with Turkey -- he's convinced the terrorism accusations are B.S.
As we reported ... Kanter's a wanted man in his homeland of Turkey, where government officials are claiming he's part of an "armed terrorist organization.