I want to make the Yazidi religion its own religion rather than being a simple heresy. I'm not looking to add flavour events or anything, I just want to separate it so that independent Yazidi powers stop getting converted to Sunni islam (even when surrounded by Shia's). I know HIP and CK2+ made Yazidi a part of Mazdan but I'm not sure if it retains heresy status. I'm looking to separate it like how Sunni/Shia/Ibadi are split, able to interwar and convert but not 'lapse' into one another.
So how would I got about doing this?
So how would I got about doing this?