Jesus brought about the potential of spiritual salvation. But we're still waiting for the physical salvation to occur. Jesus chose the new Messiah to continue his mission. That mission requires not just the restoration of Adam (Jesus); it also requires the restoration of an Eve. That has yet to happen. Hence, the reason Satan is still the ruler of this fallen world. Yes, being a Christian is the highest level of religion among all the rest. But new truth (eternal gospel) opens the way to an even higher level. So we're both right.