Democratic Systems or Interference by God
It was not because Israelites asked God to send them the Son of God or Christ that God sent Christ Jesus to Palestine 2000 years ago but because God judged the necessity.
It was not because Judaists in Egypt asked God to send them Moses or a great leader who would lead them out of slavery in Egypt but because God judged the necessity. It was also not because Muhammad asked Go to speak to him but because God judged the necessity.
For centuries at least since the first century no matter how hard Judaists, Christians, or Muslims asked God to send then the new Savior or King, God didn't to respond to such pleading. So, people chose their kings depending on situations. But as time went by, societies changed and got complicated, so that no kingship could work well in governance and administration. Accordingly, most of modern countries in Europe and Asia abolished kingship and adopted democracy or dictatorial regime by dictatorial group members.
Today, nobody thinks that God will send a prophet or His substitute to the human world. But, nobody thinks that God doesn't send a prophet or His substitute to the human world because He respects democracy. Judaists, Christians, and Muslims know that God had power to override democracy or tyranny. But in the past, when God did such interference, He sent Moses while Hebrews were in slavery in Egypt, facing a real crisis as a whole tribe; Christ Jesus when the Diaspora of Hebrews was coming ; and spoke to Muhammad when Judaism and Christianity lost saving power on Arabs. It is unthinkable that God judges that Judaists, Arabs, or the whole mankind today now face such a crisis, because the world has become technologically/financially advanced and so complicated today.
But it also true that this world cannot reach the Kingdom of God through democratic processes or any rigorous practice of Islam against the modern Westernized world of today. So, some people think that the world and the mankind cannot be improved without direct interference of God. But how will God interfere?
The most reasonable expectation might be that God helps people choose better leaders through democratic systems if God doesn't send another Savior who has overwhelming power and authority to save poor or tragic people in this world.
Anyway, rich and bad people make others suffer, so that suffering people need somebody to defeat those rich and bad people through democratic systems or as the result of interference by God.
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Mar 10:23 And Jesus looked round about, and saith unto his disciples, How hardly shall they that have riches enter into the kingdom of God!