All Peter needed on the day of Pentecost was this:
Acts 2 14But Peter, standing up with the eleven, lifted up his voice, and said unto them, Ye men of Judaea, and all ye that dwell at Jerusalem, be this known unto you, and hearken to my words:
15For these are not drunken, as ye suppose, seeing it is but the third hour of the day.
16But this is that which was spoken by the prophet Joel;
17And it shall come to pass in the last days, saith God, I will pour out of my Spirit upon all flesh: and your sons and your daughters shall prophesy, and your young men shall see visions, and your old men shall dream dreams:
18And on my servants and on my handmaidens I will pour out in those days of my Spirit; and they shall prophesy:
19And I will shew wonders in heaven above, and signs in the earth beneath; blood, and fire, and vapour of smoke:
20The sun shall be turned into darkness, and the moon into blood, before the great and notable day of the Lord come:
21And it shall come to pass, that whosoever shall call on the name of the Lord shall be saved.
22Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as ye yourselves also know:
23Him, being delivered by the determinate counsel and foreknowledge of God, ye have taken, and by wicked hands have crucified and slain:
24Whom God hath raised up, having loosed the pains of death: because it was not possible that he should be holden of it.
25For David speaketh concerning him, I foresaw the Lord always before my face, for he is on my right hand, that I should not be moved:
26Therefore did my heart rejoice, and my tongue was glad; moreover also my flesh shall rest in hope:
27Because thou wilt not leave my soul in hell, neither wilt thou suffer thine Holy One to see corruption.
28Thou hast made known to me the ways of life; thou shalt make me full of joy with thy countenance.
29Men and brethren, let me freely speak unto you of the patriarch David, that he is both dead and buried, and his sepulchre is with us unto this day.
30Therefore being a prophet, and knowing that God had sworn with an oath to him, that of the fruit of his loins, according to the flesh, he would raise up Christ to sit on his throne;
31He seeing this before spake of the resurrection of Christ, that his soul was not left in hell, neither his flesh did see corruption.
32This Jesus hath God raised up, whereof we all are witnesses.
33Therefore being by the right hand of God exalted, and having received of the Father the promise of the Holy Ghost, he hath shed forth this, which ye now see and hear.
34For David is not ascended into the heavens: but he saith himself, The Lord said unto my Lord, Sit thou on my right hand,
35Until I make thy foes thy footstool.
36Therefore let all the house of Israel know assuredly, that God hath made the same Jesus, whom ye have crucified, both Lord and Christ.
37Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?
now how many does it say was saved that day?
41Then they that gladly received his word were baptized: and the same day there were added unto them about three thousand souls.
hmmmmmm
In
1 Corinthians 2 Paul writes
1And I, brethren, when I came to you, came not with excellency of speech or of wisdom, declaring unto you the testimony of God.
2For I determined not to know any thing among you, save Jesus Christ, and him crucified.
Doesn't seem to me that all this hellfire stuff is needed. If you can scare them INTO the kingdom someone else can scare them OUT of it.
Preach Jesus to them and let that touch their hearts. Let them fall in love with Him, don't try to scare them into loving Him.