That is not at all what Graham is suggesting, and you are ending up agreeing with his position! He said that people in whom the Spirit is operating--may possibly be saved by responding to those operations, but always saved by and through Christ. He is not a Pelagian, and neither are we.
The point is, they cannot "choose" to seek Christ, unless God is pleased to reveal it to them.
And no one says otherwise...but who is anyone to say that God does not please to reveal it--in some way--to those who are outside the Church? Will you tie the hands of the Almighty now?
If someone responds to the graces they are given, the possibility of salvation is there: not through their own merits of course, but through the merits of Christ.
Don't forget, my friend, it's the Catholic Church who still hold tenaciously to the famous dogma "Outside of the Church there is no salvation". Properly interpreted of course. :)
If "responding to grace" is what saves a man, how is this not a work of man's own ability? From where does this ability to respond positively come?
IOW, why do some respond and others ignore? What is better in one man than another?
Is one man more righteous than another?
Is God's grace, ordained from before the foundation of the world, a mere "possibility?"