There are many scenarios you could ask that same question in, or in at least the same vein, is everybody going to have an equal opportunity to hear and believe, probably not. The Bible states God will have mercy on whoever he chooses to:

Rom 9:14-16  What shall we say then? Is there injustice on God's part? By no means!  (15)  For he says to Moses, “I will have mercy on whom I have mercy, and I will have compassion on whom I have compassion.”  (16)  So then it depends not on human will or exertion, but on God, who has mercy.

I don't and can't make excuses for God - He is God. The only righteous and just Dictator in the history of the universe.