Is Israel God's Time Clock?

I don't know how many times I said this before, "Israel is God's time clock!. The problem with that statement is that during this current Dispensation of Grace in which we live, God is not doing anything with Israel. They have been set aside according to Romans 11, and prophecy is not being fulfilled at this time because we are living in what Paul called the mystery period (Ephesians 5:32). That makes the statement incorrect. 

The only thing that we are looking for as the Body of Christ is the Rapture of the church, and no one knows when that is going to happen. The context of Luke 21:28 is the Tribulation period, and we will already be gone.