Blind spot, ha.If you want to believe that God saves those that do not believe so that He can pour faith into them after they are saved then so be it. But even your quote says it is through faith for a salvation. Do you not understand that clear sentence? Through faith not unto faith as you keep saying.
Your blind spot is just amazing. But it is your blind spot.
Peter tells us that God is the cause and the one who will keep our faith until we get to heaven, which is the culmination of our salvation. The speaker in Hebrews tells us the same thing (author and finisher of faith).
Your terrible hermeneutics regarding God's salvation reveal you glory in man, not God.