Matthew 10:5-6
These twelve Jesus sent out, instructing them, “Go nowhere among the Gentiles and enter no town of the Samaritans,
6 but go rather to the lost sheep of the house of Israel.
Here Jesus is talking about the lost sheep of the house of Israel. Nowhere does it say that Jesus does not have Gentile sheep. Of course, elsewhere Jesus makes it abundantly clear that He came for His scattered sheep, not just of Israel:
John 11:51-52
He did not say this on his own, but as high priest that year he prophesied that Jesus would die for the Jewish nation,
52 and not only for that nation but also for the scattered children of God, to bring them together and make them one.
Brother, regarding John 12, let‘s look at the context:
John 12:18 -19
The reason why the crowd went to meet him was that they heard he had done this sign.
19 So the Pharisees said to one another, “You see that you are gaining nothing. Look, the world has gone after him.”
Firstly, by way of a bonus point, would you say that “world” here means all men everywhere?
John 12:20-26
Now among those who went up to worship at the feast were some Greeks.
21 So these came to Philip, who was from Bethsaida in Galilee, and asked him, “Sir, we wish to see Jesus.”
22 Philip went and told Andrew; Andrew and Philip went and told Jesus.
23 And Jesus answered them, “The hour has come for the Son of Man to be glorified.
24 Truly, truly, I say to you, unless a grain of wheat falls into the earth and dies, it remains alone; but if it dies, it bears much fruit.
25 Whoever loves his life loses it, and whoever hates his life in this world will keep it for eternal life.
26 If anyone serves me, he must follow me; and where I am, there will my servant be also. If anyone serves me, the Father will honour him.
Jesus is sought after by Greeks. This directly prompts the following teaching of Jesus. The arrival of these non-Jews prompts Jesus’ words, "The hour has come for the Son of Man to be glorified.”
John 12:27-36
“Now is my soul troubled. And what shall I say? ‘Father, save me from this hour’? But for this purpose I have come to this hour.
28 Father, glorify your name.” Then a voice came from heaven: “I have glorified it, and I will glorify it again.”
29 The crowd that stood there and heard it said that it had thundered. Others said, “An angel has spoken to him.”
30 Jesus answered, “This voice has come for your sake, not mine.
31 Now is the judgement of this world; now will the ruler of this world be cast out.
32 And I, when I am lifted up from the earth, will draw all people to myself.”
33 He said this to show by what kind of death he was going to die.
34 So the crowd answered him, “We have heard from the Law that the Christ remains for ever. How can you say that the Son of Man must be lifted up? Who is this Son of Man?”
35 So Jesus said to them, “The light is among you for a little while longer. Walk while you have the light, lest darkness overtake you. The one who walks in the darkness does not know where he is going.
36 While you have the light, believe in the light, that you may become sons of light.”
So in the context, brother, we see Jesus drawing all kinds of men,
Jew and Gentile. John 12:37-40
When Jesus had said these things, he departed and hid himself from them. 37 Though he had done so many signs before them, they still did not believe in him,
38 so that the word spoken by the prophet Isaiah might be fulfilled:
“Lord, who has believed what he heard from us,
and to whom has the arm of the Lord been revealed?”
39 Therefore they could not believe. For again Isaiah said,
40 “He has blinded their eyes
and hardened their heart,
lest they see with their eyes,
and understand with their heart, and turn,
and I would heal them.”
But some still did not believe, brother. How is this? We know that those who are drawn believe and will never be forsaken. Here we have further proof that the text cannot mean all men everywhere head for head.
And what does Isaiah say? They are blinded, brother. The are not drawn by the Lord.
I’ll return to your other texts later, but you can be sure that none of them necessitate a general ransom theory. And at least two of the texts have been addressed further back in the thread.
In Christ