Even Matthew, IIRC, believes Protestants are Christians. He can confirm if it is otherwise. Matthew even supported Tɾυmρ, and encouraged all other Cathinfo members to do so, as did I, and Sean also finally ended up voting for him; while you did not, Ladislaus, giving "he was not a Christian" as one of your lame excuses. So it was in light of that that I supported +Vigano, who also called Prots Christians, and encouraged votes for Tɾυmρ. Although you claimed you would support Vigano for Pope at the time, you disagreed with your supposed hoped-for-Pope on his guidance here.
I stand by what I said: (1) if someone believes explicitly the Holy Trinity and Incarnation (2) has been validly baptized (3) is in good faith or invincible ignorance with respect to other articles of faith (4) such a one is inside the Church and (5) consequently can be saved. This is in full conformity with pre-Vatican II Catholic Theology, as explained by Msgr. Fenton. You reject that pre-Vatican II theology, following either the Dimonds or Ibranyi (I believe even the Dimonds admit points (1)-(5) above; they even call such people Catholics) and that's not my problem at all. It is yours.
Let's see what Matthew explains about his beliefs.