The discrimination is coming from the KRG.
Under the Saddam regime for 34 years, Saddam imposed Arabic ethnicity on Yazidis. Then, when Saddam was gone, the KRG took over Saddam's unfinished work and they imposed Kurdification on Yazidis. They already have bought many Yazidis with money, including the Yazidi prince and others, like Khairi Bozani, or Mahama Khalil. They buy them with money and then they send them to meet with officials in the west and say that the Yazidis are Kurds, which doesn't make any sense. When the Yazidi and Chaldo-Assyrians used to live together more than 6,000 years ago, there was no mention of Kurds in the world.