Nonsense, that's the pot calling the kettle black since you're strawmanning me. Where do I say that the Catholic Church represents all Christians? I don't think in terms of single articles since I've written many series of articles on religion, all of which stand together for me.
In this one I focus on the catechism, in another I focus on Paul's epistles, and in others I focus on the gospels. I talk about liberal and conservative Christianity, ancient and modern Christianity, and so on.
The catechism says what it says, and I addressed that in this article. That's all.