Was God only dealing with the Jews from Genesis to Acts?
From Genesis 12 until well into Acts, God primarily dealt with Israel, the earthly nation, though not exclusively. The Old Testament economy focused on Israel, but sovereign grace exceptions occurred, including Jonah being sent to Nineveh, a Gentile city, and the spies meeting Rahab. So it was primarily, not absolutely, Jew only.
Les teaches that beginning way back in Genesis, God started dealing with one nation in particular, the earthly people, Israel. From Adam to Abraham was about 2,000 years, and then about 2,000 before Christ came Abraham and the nation of Israel. From Genesis 12 until well into the Book of Acts, it is primarily, not exclusively, God dealing with Jew only. Les says he picked up that term from Acts 11:19. He notes that even in the Old Testament economy God was dealing only with Israel, but in His sovereign grace He sent Jonah to Nineveh, a Gentile city, and the spies ended up on the wall of Jericho and met Rahab.
During what period of the Bible timeline was God dealing only with the Jews?
God dealt almost exclusively with the Jews from Genesis chapter 12 until the Book of Acts. This period begins with the Abrahamic Covenant and centers on the nation of Israel, including the giving of the Law and the Temple, with only very few exceptions.
From Genesis 12 until Acts, who did God primarily deal with?
From Genesis 12 through the Book of Acts, God primarily dealt with the Jewish people, Israel. This was not exclusive, as He showed sovereign grace to Gentiles like Nineveh and Rahab, but the primary focus remained the nation of Israel, the earthly people.