"If we are faithless, He remains faithful, for He cannot deny Himself."
2 Timothy 2:13
God's faithfulness does not depend on our faith or lack of it. To those who believe, He is their Savior and He will remain so forever. To those who don't believe, who reject Him, He remains faithful to save them, if they call upon His name in this life. But if they don't, there will come a time of judgment when they will give an account for their decision. For God to act any other way would be contrary to His nature. God's holiness demands justice, but His mercy drove Him to the cross.