The cloud of witnesses were the saints in Hebrews 11. These people are the root of the olive tree and the nation of Israel and elected gentiles are the branches. The two peoples that came from Abraham. The branches in the olive tree must be of the same faith as Abraham. Romans 9:6 here are the two Israel’s , of the flesh and of the promise, but only those of the promise are the true Israel, the true children of Abraham. This is carnal Israel and spiritual Israel and spiritual Israel is the church, a mix of Israelites and Gentiles that will compose the 144000. The church has always been the true Israel of GOD, and this fact exposes the error of replacement theology. These facts prove the identity of the 144000, they are the church. The Philadelphia church is the faithful remnant of the 144000 who are alive at the return of Christ. The entire olive tree is sealed weather dead or alive at the 1335 days. Blessed is he who waits.