Umseting - Turkiskt-Enskt - Türkiye Türklerindir

Or:
Turkey belongs to the Turks
or even better
Turkey belongs to the Turkish people
because in (North America, anyway), we generally prefer to say
He is Turkish
and we sometimes try to avoid
He is a Turk
(it is the same with other nationalities, i.e.
He is Russian
and not
He is a Russian)
...

I fully agree with Ian.