I have learned over many years never to attribute much importance to any person.That certainly applies here. This is a tempest in a teapot. Ann, for all her books, is a little person in the big political scheme of things (I'm just talking US politics, not cosmic meaning) and maybe that's why she hates Farah so much. In some way, he has reminded her of that fact.
“I think that Ann is a Roman Catholic”
Her father was. I believe she claims to be Presbyterian.
Ann Coulter is a Presbyterian...don't know which particular denomination. i believe you have her confused with another conservative blond*, Laura Ingraham, who converted to Catholicism.
*For the record, Ingraham is probably not a blond any more. While she was recovering from chemo from her breast cancer, her hair grew in gray. Coulter was more of a "dishwater" blond or possibly 'strawberry blond' when she was teenaged.