Moreover, brethren, I would not that ye should be ignorant, how that all our fathers were under the cloud, and all passed through the sea; And were all baptized unto Moses in the cloud and in the sea; And did all eat the same spiritual meat; And did all drink the same spiritual drink: for they drank of that spiritual Rock that followed them: and that Rock was Christ. But with many of them God was not well pleased: for they were overthrown in the wilderness. 1 Cor. 10:1-5
Just as in chapter 12 Paul doesn't want them to be ignorant. Who were these Christians whose fathers are being spoken of. In the wilderness was not the only time they were overthrown. They never pleased God and they turned to idols. Just as the Lamb was slain prior to the creation of Adam, this also did not surprise God. God chose them as his firstborn of the all the families of the earth to be his witnesses.
Isa. 44:8 Fear ye not, neither be afraid: have not I told thee from that time, and have declared [it]? ye [are] even my witnesses. Is there a God beside me? yea, [there is] no God; I know not [any].
Verses 9-17 They make a graven image, form a god, how they shamefully make it from wood, burns it, cooks with it, warms himself, worships it, the works of his hands.
V-20 He feedeth on ashes: a deceived heart hath turned him aside, that he cannot deliver his soul, nor say, [Is there] not a lie in my right hand?
The dumb idols of 1 Cor. 12:2 Ye know that ye were Gentiles, carried away unto these dumb idols, even as ye were led
V 21-23 Remember these, O Jacob and Israel; for thou [art] my servant: I have formed thee; thou [art] my servant: O Israel, thou shalt not be forgotten of me. I have blotted out, as a thick cloud, thy transgressions, and, as a cloud, thy sins: return unto me; for I have redeemed thee. Sing, O ye heavens; for the LORD hath done [it]: shout, ye lower parts of the earth: break forth into singing, ye mountains, O forest, and every tree therein: for the LORD hath redeemed Jacob, and glorified himself in Israel.
V 1-7 shows it is by his spirit they will know and be known.
In chapter 46 is where every knee shall bow and every tongue shall confess because these that were ignorant God has redeemed in their ignorance.
Isa 44:18 They have not known nor understood: for he hath shut their eyes, that they cannot see; [and] their hearts, that they cannot understand.
Read Hosea.