*** We’re over there because of Christians and Kurds who fought and put down ISIS with our air support, ***
If you think the Kurds are allies of the Christians, you are mistaken. Look at the Nineveh Plains in Iraq, and Qamishli in Syria. Read what the Christians have to say about their suffering under the Kurds.
They are SDF. Sure, at times, one can find stories where they do not get along. Obviously, you are savvy with search engines, I tend to use bing, just search "SDF syrian democratic forces christians kurds". I know there have at times been problems in Qamshli, stories are out there of Kurds taking over Christian homes and things like that as well. There's lots out there