You quoted John 1:11 but didn't go on to read verse 12, and as I hope you are aware a text with out context is a con.
He came to that which was his own [The Jewish people], but his own did not receive him. 12 Yet to all [yes all, anyone] who did receive him, to those who believed in his name, he gave the right to become children of God [so all Jew or Gentile] — 13 children born not of natural descent, nor of human decision or a husband’s will, but born of God
[see not those born in to the Jewish race but those that God has adopted as His children]
And Acts 28:28 says
"Therefore I want you to know that God’s salvation has been sent to the Gentiles, and they will listen!”
Has been sent! Not is about to be sent, is going to be sent, will be sent, but HAS been sent. Past tense!
God reaching out the gentiles doesn't start with Paul, it doesnt start in Acts.
It starts (as best of my knowledge) in the book of Joshua when Rahab and her family (from Jericho, a gentile city) are saved from death through faith in a small red ribbon. It is extended to Ruth and further more to Nineveh by Jonah.
The writers of the psalms declares that he is the God of ALL nations.
It is expanded on multiple times through both the major and minor prophets but lets focus on Isaiah
Isaiah 11:10 "And in that day there shall be a Root of Jesse [A Jew], who shall stand as a banner to the people [that will be for everyone to see]; for the Gentiles shall seek Him, and His resting place shall be glorious."
Isaiah 42:1 "Behold! My Servant whom I uphold, my Elect One in whom My soul delights! I have put My Spirit upon Him; he will bring forth justice to the Gentiles.
Isaiah 49:6 Indeed He says, `It is too small a thing that You should be My Servant to raise up the tribes of Jacob, and to restore the preserved ones of Israel; I will also give You as a light to the Gentiles, that You should be My salvation to the ends of the earth.'"
Isaiah 60:13 “The glory of Lebanon will come to you, the juniper, the fir and the cypress together [
those things that make other countries seem beautiful], to adorn my sanctuary; and I will glorify the place for my feet.[
will be used to bring me glory] [
so the best bits of all nations will be used to glorify God]
To say that the start of when Gentiles could be saved is in the middle of Paul's missionary work is frankly bizzare.
Acts 2 where the Holy Spirit comes upon the followers of God (not just the 12 disciples), and they speak out declaring God's greatness, is heard by people from all nations: "Parthians, Medes and Elamites; residents of Mesopotamia, Judea and Cappadocia, Pontus and Asia,[
b] 10 Phrygia and Pamphylia, Egypt and the parts of Libya near Cyrene; visitors from Rome 11 (both Jews and converts to Judaism); Cretans and Arabs—we hear them declaring the wonders of God in our own tongues!” (Acts 2:9-12)
Peter then stands up and addresses the crowd, and quoting from the prophet Joel:
17 “‘In the last days, God says, I will pour out my Spirit on all people. Your sons and daughters will prophesy, your young men will see visions, your old men will dream dreams.18 Even on my servants, both men and women,I will pour out my Spirit in those days, and they will prophesy.19 I will show wonders in the heavens above and signs on the earth below, blood and fire and billows of smoke.20 The sun will be turned to darkness and the moon to blood before the coming of the great and glorious day of the Lord.21
And everyone who calls on the name of the Lord will be saved.’
But suppose you are right and that God stopped speaking in Acts 28, and left us on our own (something which He promissed he would never do). What does that mean for the passages of scripture written afterwards? We should ignore them. Therefore the book of Revelation isn't under divine inspiration but rather the musings of an exhausted Jew.
What more you are trying to tell me that the gift that the Spirit has given to me isn't applicable to modern day life? You are saying that when my naming was prohesised by a minister that was just an act of deception? And that the times when I have prophesised over people, that they have meant nothing? You don't only insult me when you say that, you insult the One who made me.