Matthew 24 is a hint that can be used to find the people whom Jesus redeemed. He talks about the gospel being taught to all the nations throughout the world as a witness and then the temple would be thrown down.
Paul affirmed that this was accomplished:
“For the hope which is laid up for you in heaven, whereof ye heard before in the word of the
truth of the gospel;
6 Which is come unto you, as it is in all the world; and bringeth forth fruit, as it doth also in you, since the day ye heard of it, and knew the grace of God in truth:”
“ If ye continue in the faith grounded and settled, and be not moved away from the hope of the gospel, which ye have heard, and
which was preached to every creature which is under heaven; whereof I Paul am made a minister;”
Colassians 1:5,6,23
The “whole world” consisted of where the scattered Israelites resided at the time the NT epistles were written which is the context we are to read the scriptures, not twisting them to fit our current world view.
Jesus made it clear where the gospel was to be preached for his ministry to be accomplished then He would destroy the temple as punishment and as a sign to the world going forward.
Every apostle made it clear to whom their apostles were written ALL where those of the Elect of God, israelites according to the flesh
“Peter, an apostle of Jesus Christ,
To those who are
elect exiles of the Dispersion in Pontus, Galatia, Cappadocia, Asia, and Bithynia,2 according to the foreknowledge of God the Father, in the sanctification of the Spirit, for obedience to Jesus Christ and for sprinkling with his blood”:
1 Peter 1:1,2
“James, a servant[
a] of God and of the Lord Jesus Christ,
To the
twelve tribes in the Dispersion:”
James 1:1
The Spirit forbade the apostles to take the gospel to those it was not prepared for:
“Now when they had gone throughout Phrygia and the region of Galatia,
they were forbidden by the Holy Ghost to preach the Word in Asia.”
Acts 16:6
Take a map and plot where the gospel was preached and established, there you will find the elect of God. Adamic man was to be granted eternal life and it was prophesied in Genesis 9 :
“May God extend Japheth’s territory;
may Japheth live in the tents of Shem, and may
Canaan be the slave of Japheth.”
The scattered Israelites consumed the territories of Japheth fulfilling Gods promise to Adamic man which has spread out since the gospel was preached. God has blessed them wherever they have gone. Compare that to what Jesus referred to as the “goat nations” which is every nation who has rejected christianity. They have been accursed since 33AD and the only reason they all aren’t living in the dark ages still is because Gods Elect have shared their innovation and blessings yet they are still accursed until the end when they overtake the house of Jacob prompting the coming of our King to rescue his people.
Also,
Canaan has been the slave everywhere they have been taken as Genesis 9 prophesied.
If the bible is read correctly, in context, you can interpret the world around you and see the mighty works of our God fulfilling all that He declared through the prophets but this is obviously not popular to the schemes of and the children of darkness so they have infiltrated the churches and since the early 1800’s have caused the falling away of all of christendom.