If Unconditional Election is true why did Jesus say “”Go into all the world and preach the good news to all creation.” (Mark 16:15)? I they are already predestined to be elected, what difference does it make whether we go or not? Why preach the Gospel? They will be saved regardless. No one who is not saved will be saved if they are not foreordained as the elect.
BTW: I’m not Catholic.
Furthermore, the exact order of the books (Matthew, Mark, Luke, and John) are specified in Zechariah, if someone cares to study Zechariah carefully. Zechariah is proof that the books of Matthew, Mark, Luke, John; are the continuation of the Old Testament, that is why I call them part of the Old Testament.
Now to you question:
Israel was elected in the Old Testament. The Church, the Body of Christ, Colossians 1:18, [not Catholic] is predestined and elected:
Ephesians 1:4 According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love: 5 Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will
As believers, we preach the Grace of God to everyone who will listen, warning them of Hell and the Lake of Fire and eternal damnation. We preach because God has made us Ambassadors for Christ. Individually, we may not know who is elected; but for the love of Christ and the Father of all glory, we preach and warn and exhort all to hear the message of grace for salvation. This is not counter to Unconditional Election. I hope this helps.
Why preach the Gospel?
Why did our LORD have to call Lazarus out from the grave? Since he was dead, Lazarus would not have heard anything and it would seem foolish to those who witnessed this spectacle for Jesus to be calling out to a dead man. Lazarus was so dead that he smelled of rot and decay; Martha believed all hope was so lost. The simple words of life our LORD spoke "Lazarus come forth" and Lazarus irresistably came from the tomb still bound in his grave clothes. John 11:40 tells us why this took place "Did I not say to you that if you would believe you wold see the glory of God" and that is why we preach the Gospel to those who show all signs of being dead - stinking of the rot and decay of their spiritual lifelessness.
Like Lazarus, he had to be made alive before he could hear the words of our LORD. Jesus didn't stop off at every tomb and every funeral and raise all within from death even though we all know that He could just as easily done that, and yet no one here is critical about our LORD choosing Lazarus and passing by the rest. No one here is calling God a monster for choosing whom He would reveal His glory through. Yet the Free Willers take every opportunity to ridicule and declare foolish God's means of revealing His glory through salvation.
1 Cor 1:21-22 "For since, in the wisdom of God, the world through wisdom did not know God, it pleased God through the foolishness of the message preached to save those who believe."
And that is why those of us who have been made alive in Christ preach the Gospel to those who are spiritually dead. You may call this method of God's "foolish" and you may mock it, yet for those of us who have been sanctified into the knowledge of His truth rejoice in that while He could have passed us all by, he stopped by, made us spiritually alive, called us from our tomb, and clothed us, not in our grave clothes, but in His robes of righteousness.
Next question?