Pope Francis, SSPX, CMRI, non-Dimond sedes, most post Vatican II Curia, all of them, share the same liberal error. All of them redefine who is in and who is outside the Church, creating loopholes, every time more allowing, until there is nothing left of the original infallible dogma.
Unless you are a "feeneyite" there is nothing to criticize about Pope Francis statement; however to "feeneyite" ears, this statement does seem contradictory to the Council of Florence, which clearly teaches that not even a person dying in the name of Christ is saved unless he is part of the Catholic Church, therefore, according to this, the martyrs Pope Francis are referring to, should not be not saved because they are not part of the visible, Church of Christ. I said, "seems" because I am not sure if he did say that these people are going to Heaven or not, although he of course implies this by calling them Christian martyrs, instead of schismatics and heretics as in previous times.