I believe you are confusing the Kurds with the Yazidis.
Kurds in N. Syria told me that the Kurds claim they are the decendants of Yazidis (aka Ezidi). The Yazidis(Ezidi) do worship some angel, but they have smattering of other religions. They are very secretive, their religious ceremony is memorized and not written. They are largely pacifist. Since ISIS, that has changed and they have armed themselves.
Note, There are a large number of Kurds who are Jewish. Over the years of persecution many have moved to Israel.
I am not confusing them actually.