It's a mystery to me, but I think idolatry and ideology are interchangeable where hate is involved. I think it has something to do with the idea of supremacy. I see this in the liturgy war. The central Mystery comes in second to those who wrongly worship what they call TLM. It's actually the 1962 Tridentine Rite, which Benedict XVI called Extraordinary Form to distinguish it from the 1969 Ordinary Form (Missale Romanum). If they hadn't made the former an idol they would be accepting of the latter. This is abuse which needed to be corrected. I mention this since racial hatred is linked to the idolatry of worshipping Latin as a language.