Nonsense.

Thank you; I've been aware of that since the first week I became a Christian (I was blessed with good teachers). And nobody's disputing it. Dr. Ruckman asked for a verse, in the Old Testament prophets, that said, specifically, that one is saved purely by faith in the Messiah. No such verse exists. Isaiah 53:10, 11 comes close, but not quite; and, anyway, Isaiah is not "all the prophets," as Peter says in Acts 10:43.

Do all of the Old Testament prophets bear witness of Jesus Christ? In one way or another, yes. But they simply do not say that anyone will be saved by faith in Christ alone. They had not been given that revelation. (Peter's words in Acts 10:43 are similar to Jesus's words in John 9:58.) There is no contradiction or problem here at all.

The real point of Acts 10:43 is found in the word "whosoever." He is telling the people that salvation will not be limited to the Jews. This is the context of the verse; the entire chapter concerns God granting salvation to the Gentiles. Acts 10 is where Peter has the vision of the sheet, and where the first Gentile convert to Christ (Cornelius) is recorded. Acts 10:43 is part of Peter's first sermon to Gentiles, immediately after receiving the vision. There's no need to complicate it.

Nobody's questioning the word of God, thank you; we are attempting to understand it.

Unless you've known him longer than I have (25 years), and unless you've read his works, you simply don't know what you're talking about.