I theorized it has something to do with the fact that red hair and blue/green eyes is mutation that is unique among european caucasians and thus what makes whites visually stand out compared to the rest of the world. hollywood jews and leftist being the crazy racist they are sees this as some form of injustice seeks to remedy it by warping any depiction of your typical ginger (which are usually irish descent) to the one race they look the lowest upon, blacks.