Who did Jesus preach and proclaim Himself to during His earthly ministry?
During His three years of earthly ministry, Jesus preached and proclaimed who He was only to the nation of Israel. That ministry was primarily, not exclusively, God dealing with Israel. After they crucified Him and He ascended, the next prophetic event would be tribulation and then the Kingdom.
Les explains that from Abraham until Christ's first advent, God primarily, though not exclusively, dealt only with the nation of Israel. Christ came and brought about His three years of earthly ministry, preaching and proclaiming who He was only to the nation of Israel, and they crucified Him. He ascended back to glory. According to Psalms 2, the next event would be the wrath and vexation—the seven years of tribulation—and then Christ would come and set up His Kingdom. Les notes that the church age is missing from the Old Testament; not a word about it there.