That was an interesting documentary but very one-sided. I know a lot of injustice happened for Kurdish people, in Iraq, in Turkey in Iran and Syria.
We always hear the story of they defeated ISIS (which is a myth) but it wasn't like they helped anybody. actually they crawled back to their own region when ISIS was taking over half of Iraq and Syria. their reaction was "we don't care, they are not our enemy" they only came to fight ISIS because they had to. because ISIS was coming for them. and they should stop counting on USA (or any other country) to do something for them. where was USA when Saddam dropped chemical bombs on them and killed thousands of innocent souls ? and from where Saddam got those bombs ? of course they gave Saddam those bombs to use it against Iran (which he did) but he also killed lots of Kurdish people in process.
this Turkey/Kurds conflict created lots of discussions here in Iran as well. we have lots of Kurds and Azeris living here , obviously they take side in this conflict. personally I don't know what to say because while Turkey's attack hurt the innocent civilians (which is terrible and they should stop it immediately) but they also have the right to defend themselves against the terrorists, how come USA can fly oceans and invade 2 countries for that and Turkey can't invade 30 km next to its borders ?
based on my own experiences with Iranian Kurds most of them consider themselves Iranian first, but an independent Kurdistan will create chaos even in Iran, some of those lands you see in that map aren't only for Kurds. there are other ethnics living there as well. nowadays people move inside the country and marry someone from another ethnic group. you can't draw a line and say people in the left are 100% Kurds and people on the right are 100% not Kurds.
btw things are messy in this region. and I think there is no solution for some of these conflicts. I think the only one benefits from this is Bashar Asad, Kurds have no other option to go back to him. (probably that's what Turkey wants too)