I'm not arguing with the above poster. I'm expounding. The confidence people have in their moral compass may be overinflated but that doesn't mean it's without value. I'd take the judgment of a social justice warrior over the Church of England any day of the week. But also you have to recognize that not everyone is so self-important and can be rational. Modern liberal values are a massive improvement over the past even if not everyone applies them sensibly.
Just a quibble, not to argue with your overall point- isn’t the modern CoE, as a mainline church, much closer to the prototypical SJW than a more conservative religion?