The Jews/Israelites are God's chosen people, and Israelies were special to God, and chosen to bring the Messiah to the world; but as Jesus was prophesied from the beginning of time, was the creator of earth, and sacrificed for all souls on earth; and we are all descendants of Noah made in God's image, why would God not speak to all people and nations, prophesying Jesus and His word to them all?
Deuteronomy 7:6
ESV - 6 For you are a people holy to the Lord your God. The Lord your God has chosen you to be a people for his treasured possession, out of all the peoples who are on the face of the earth.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
There is only one way for souls (people) to turn from idol worship; it is for the Creator of our soul to turn us. So why does He not turn us all from walking in darkness to living in the light?
Listen to what God told Moses to tell Pharoah, before he sent the 7th plague, hail mingled with fire:
'Thus says the Lord God of the Hebrews: "Let My people go, that they may serve Me, for at this time I will send all My plagues TO YOUR VERY HEART, and on your servants and your people, that you may know that there is none like Me in all the earth. Now If I had stretched out My hand and struck you and your people with pestilence, then you would have been cut off from the earth. (here it is) But indeed for this purpose I have raised you up, that I may show My power in you, and that My name may be declared in all the earth. As yet you exalt yourself against My people in that you will not let them go."' (Exodus 9)
God goes on to tell Pharoah to gather all his livestock that's out in the field because everything left out in the field will die in the hail storm.
He told Pharoah, 'I could just kill you and your people and get it over with, but I ain't gonna do it like that. I'm gonna show My power, and I'm gonna use you to show it, since you got a lot of people convinced that you fear no one.'
God's name will be exalted! Every knee will bow, and every tongue will confess Jesus as Lord of all. Some will die in the field; some will be gathered to the King. It's His decision of whom.
God could have appeared to Pharoah in a dream, but He didn't. Wouldn't it have been a little more convincing if God had spoken directly to the Pharoah, than it was to send Moses to talk to Pharoah? Why not do it that way? Why send a sheep herder?
It wouldn't have made a difference. God has to soften the heart.
Why use the preaching of the gospel? Why not stop the sun from shining for about a week? Then appear in the sky with a heavenly host of shining stars, and proclaim the day of the Lord, or something like that?
That wouldn't open the eyes of the truly blind. That wouldn't open the ears of the truly deaf. Repentance is a personal experience.
God spoke from heaven when Jesus spoke to the people about his impending death on the Cross, in John 12. The people who stood by and heard it said that it had thundered, and others said, "An angel has spoken to him." My guess is, the "others" didn't hear it but were told about it and came up with, 'It wasn't God speaking, it was probably an angel.'
That's the story of mankind when it pertains to our brokenness. In Acts 2, on the day of Pentecost, some mocked; said the men speaking in tongues were drunk. Peter preached; 3,000 had ears to hear, but not everybody. That's mankind's story.
God has a plan to create man in His own image. "As we have borne the image of the man of dust, we will also bear the image of the heavenly Man" (1 Cor 15:49).
He is the image of the invisible God, the firstborn of all creation (Col 1:15).