Is this really a god's idea of justice?

What was that reason? If you harden your heart against God he will blind them from ever receiving salvation. Just as the Israelites who disbelieved God did not see the promised land but died, and the only two spies that had faith entered into the promise land, so is true with heaven where not flesh is saved or destroyed but the soul, the eternal part of man. God will let people be blind if they so seek to be blinded by turning against him.