Says who? You don’t know what state that man’s soul is in, and you certainly will not know the state of that soul is in at that very moment of death God forbid should it ever occur in this manner. The fact you show no charity for that man’s soul first and foremost, is quite telling and not in keeping with our Lord. A man who gets to decide on his own what is a martyr and isn’t. Quite the prideful soul there. You sound like those bishops who are unfathful to the Church that in part allowed all this to happen because they refused to teach the fullness of truth. You are in serious error just like those unfaithful. Pride is a deadly sin. Humble yourself or the same fate that awaits those unfaithful bishops who don’t repent will be your destiny as well.
That man is not Catholic. Anyone with Sensus Catholicus can see that. This has nothing to do with pride and everything to do with sensus catholicus.
Unless he converts to the Catholic Faith, he can not die a Catholic martyr.