Wth, do you even listen to yourself? Just look at the facts, kurdish and farsi (persian) are almost mutually intelligible: "My boyfriend is Kurdish and he confirmed that Kurdish/Sorani is more similar to Farsi than to any other language. But that doesn't mean that he understands everything in Farsi (they are still 2 separate languages)" -
https://answers.yahoo.com/question/i...8123733AANqFF4
Now you might disagree, but lets just look for a chart of how the indo european languages developed (btw, Kurdish and Farsi are both indo european)
https://i.imgur.com/D9aIcgC.png
And what can we see here? A connection to persian, who would have guessed?
But i wanna BTFO you even more, so lets look at the distribution of Indo-european languages, shall we?
https://i.imgur.com/VoKncY4.png
Hmmm, maybe now you can see that absolutely clear connection between kurds and persians?
i assume we get that by not being driven by some political ideology and instead actually doing some research.
And? medes tribes are literally Persian. Look at the chart above.