Are Christ's rejection, crucifixion, resurrection, and ascension part of the Old Testament program?
Yes. The rejection, crucifixion, resurrection, and ascension of Christ are presented as part and parcel of the Old Testament program. The prophetic flow moves straight from start to finish without any hint of the church age intervening, and afterward the Holy Spirit was poured out at Pentecost.
Les explains that the coming of Christ—His rejection, crucifixion, resurrection, and ascension back to glory—is part and parcel of the Old Testament program. The prophetic flow moves from start to finish with no hint of a 1900-and-some-year intervention of the church age. Joel's "afterward" comes after those events and points to the coming of the Holy Spirit, which happened at Pentecost.
And it shall come to pass afterward, that I will pour out my spirit upon all flesh; and your sons and your daughters shall prophesy, your old men shall dream dreams, your young men shall see visions: