Calvinism hurts no one. It is simply an explanation for why things happen as they do. And it is always scriptural. All are dead and hell bound, God in his mercy redeems some from the pit. Salvation is entirely the mercy and compassion of God towards some people and not others.
Couple things about God's works. God does the work of salvation and all God's works were completed from the foundation of the world.
The apostles recognized the reason the gentiles were turning to God was because God had done his work in them.
Acts 15
14 Simon has declared how God at the first visited the Gentiles to take out of them a people for His name. 15 And with this the words of the prophets agree, just as it is written:
16 ‘After this I will return
And will rebuild the tabernacle of David, which has fallen down;
I will rebuild its ruins,
And I will set it up;
17 So that the rest of mankind may seek the Lord,
Even all the Gentiles who are called by My name,
Says the [
d]Lord who does all these things.’
18 [
e]“Known to God from eternity are all His works. 19 Therefore I judge that we should not trouble those from among the Gentiles who are turning to God,
Hebrews 4
3 For we who have believed do enter that rest, as He has said:
“So I swore in My wrath,
‘They shall not enter My rest,’ ”
although the works were finished from the foundation of the world. 4 For He has spoken in a certain place of the seventh
day in this way:
“And God rested on the seventh day from all His works”; 5 and again in this
place: “They shall not enter My rest.”
Romans 9
14 What shall we say then?
Is there unrighteousness with God? Certainly not! 15 For He says to Moses, “I will have mercy on whomever I will have mercy, and I will have compassion on whomever I will have compassion.” 16 So then
it is not of him who wills, nor of him who runs, but of God who shows mercy.
Titus 3
Remind them to be subject to rulers and authorities, to obey, to be ready for every good work, 2 to speak evil of no one, to be peaceable, gentle, showing all humility to all men. 3 For we ourselves were also once foolish, disobedient, deceived, serving various lusts and pleasures, living in malice and envy, hateful and hating one another. 4 But when the kindness and the love of God our Savior toward man appeared, 5 not by works of righteousness which we have done, but according to His mercy He saved us, through the washing of regeneration and renewing of the Holy Spirit, 6 whom He poured out on us abundantly through Jesus Christ our Savior, 7 that having been justified by His grace we should become heirs according to the hope of eternal life.
Not going to mention anything else to you about the subject for you seem to be a closed book.