https://www.episcopalcafe.com/the-trinity-is-the-heresy/ They're calling it a heresy because it is 'patriarchal'. Opposing patriarchy is now super-dogma, infallibly decreed. It seems to be in the line with the other super-dogmas: anti-colonialism, pro-sodomy, moral relativism, and situation ethics. I posted this in the Non-Anglican Discussion because that Episcopal Cafe website is not run by people who can be considered to be Anglicans, or even Christians. Heresy has become the fashion. Secular errors have become the new super-dogmas, the new dogmatic magisterium.