What the author doesn’t mention, is the extreme racism of the Arab Socialist Ba’ath Party that has ruled Syria since 1963.
Like the Nazi Party, the Ba’ath Party advocated socialism based on race rather than class. Their unending references to the mighty Arab race, are usually translated into English as “Arab Nationalism” by socialist fellow travelers in the media, but it is really Nazi-like racial supremacism. And Kurds are very explicitly NOT Arabs, in the Ba’ath Party view.
They did not just talk about about race - they terrorized Kurds with brutal oppression and systematic official discrimination. Generations of Arab kids in Syria were raised on that ideology of racial incitement in the schools of that one-party dictatorship.
The Ba’ath Party in Iraq, based on all the same principles as the one in Syria, went even further - launching a genocidal campaign (al Anfal) against the Iraqi Kurds - consciously modeled on the Nazi extermination campaign against the Jews in Eastern Europe (Einsatzgruppen).
ISIS supporters can use the race argument against Kurds to some effect, because Syrian Arabs have been racially agitated against them longer and harder than even out own “black lives matter” radicals.
Poor innocent Kurds. Hard to believe they helped murder 200,000+ Assyrian Christians.