Adding a Kurdish culture seems interesting, and maybe even a formable "Kurdistan" state. Ideally at least 1 minor state would be available in 1444 so that the state can actually be formed somewhat easily.
I think I'd play such a state if it would be available because I like small states in difficult situations.
Regarding the whole thread, the identity of a people is based on their self-awareness, not on what other people say about them.
I'll give an example based on Romanian history: the Romanians didn't identify themselves as Romanian until influenced by the French Revolution and its ideals.
The locals had been calling themselves Rumâni (aka Romanian) forever but they identified themselves more based on their regional identity, as was common in that age:
- Wallachian (Munteni, i.e. people of the mountains)
- Moldoveni
- Ardeleni (Transilvăneni; i.e. the large Romanian community in Transilvania: Ardeal = Erdely in Hungarian)
Still, the spoke the same language, shared the same religion and most of the customs. But until the 19th century there was no real unifying movement.
When the tide started to change (1848), it took only 30 years for the principalities to gain their independence and 40 more years to reunite the entire people, now called Romanian, as part of a single state.
If the Kurds consider themselves a people and want their own state, why shouldn't they have it? Or at least autonomy. Even in Romania, if we'd give Szekely Land (it has a majority Szekely & Hungarian population) autonomy, things would probably be better for everyone. Of course foolish nationalism on both sides won't let this happen (our nationalists don't want to give autonomy, their nationalists probably want full independence).
As a bystander, the Turkish reactions in this thread don't fill me with confidence regarding their ability to compromise.