All humans are welcome in hell.

Berean Standard Bible :Isaiah 14:9
Sheol beneath is eager to meet you upon your arrival. It stirs the spirits of the dead to greet you—all the rulers of the earth. It makes all the kings of the nations rise from their thrones.

Sin brings death—spiritually, physically and eternally (Romans 6:23). We’re born dead in our sins (Psalm 51:5, Ephesians 2:1). We will all die physically. And for those who don’t have their sins forgiven, they will also die eternally. Hell is called the second death (Revelation 20:14). Though the human soul exists forever, it does not live. Life is described as in the presence of God. He gives eternal life. Eternal death awaits those who have failed to place their hope and trust in Christ for salvation.

Hell is real. Jesus, the Son of God, came from heaven to teach us the way to heaven. He promised that he would give eternal life and raise from the dead everybody who believes in him (John 6:34-40). At the same time, nobody in the Bible warns so often about hell as Jesus does.

Unbelievers go to Hades.

Jesus taught in the story about the rich man and Lazarus that immediately after death unbelievers go to Hades. There they are “in torment“, and the rich man complains that he is “in anguish in this flame” (Luke 16:23-24). Of the believing Lazarus Jesus says that he is “at Abraham’s side” (Luke 16:22). Later Paul writes that after death believers are “with Christ” (Philippians 1:23). These are the states that we often think of as hell and heaven, and that we go there immediately after death. That is not totally wrong, but we should realize that these are temporary states, waiting for the judgment of the last day, when Jesus will return. Only then the full glory of heaven and the full terror of hell will be revealed.

The judgment on unbelievers.

But that’s not the message of the Bible. Rather, we are to command all men to repent and believe, because without hearing the message of Christ they cannot be saved (Romans 10:14-17).

To answer the question with zero ambiguity: Who will go to Hell? Sinners. Sinners who have not received forgiveness from God will go to Hell for all eternity.

The judgment on unbelievers on the last day is described in various ways in the Bible.

“And many of those who sleep in the dust of the earth shall awake, some to everlasting life, and some to shame and everlasting contempt” – Daniel 12:2.

John the Baptist about Jesus: “he will clear his threshing floor and gather his wheat into the barn, but the chaff he will burn with unquenchable fire” – Matthew 3:12.

Jesus talking about judgment on the last day: “Then he will say to those on his left, ‘Depart from me, you cursed, into the eternal fire prepared for the devil and his angels’” – Matthew 25:41.

“…when the Lord Jesus is revealed from heaven with his mighty angels in flaming fire, inflicting vengeance on those who do not know God and on those who do not obey the gospel of our Lord Jesus. They will suffer the punishment of eternal destruction, away from the presence of the Lord and from the glory of his might” – 2 Thessalonians 1:7-9.

“And if anyone’s name was not found written in the book of life, he was thrown into the lake of fire” – Revelation 20:15.

All these verses make clear that there are two elements to the punishment of the unbelievers. It is a punishment without end, as seen from the words ‘everlasting’, ‘unquenchable’, and ‘eternal’. It is also a severe punishment, most often compared to ‘fire’. This does not mean a literal fire, for other words are used as well: ‘shame and contempt’, ‘destruction’, ‘outer darkness’ (Matthew 25:30). Together these terms point to a terrible reality.

God’s judgment is always righteous.

Yet the torments of hell will not be the same for everybody. The Bible clearly teaches that some will be punished more severely than others. This becomes clear from the following passages:

“But I tell you that it will be more tolerable on the day of judgment for the land of Sodom than for you” – Matthew 11:24.

“And that servant who knew his master’s will but did not get ready or act according to his will, will receive a severe beating. But the one who did not know, and did what deserved a beating, will receive a light beating. Everyone to whom much was given, of him much will be required, and from him to whom they entrusted much, they will demand the more.” – Luke 12:47-48.

So the severity of the eternal punishment will depend both on what unbelievers have done in their lives, and on the opportunity they have had to hear and respond to the Gospel. God’s judgment is always righteous.

Given the terrifying descriptions of Hell, even many Christians will ask, “Is this fair? Is Hell a just punishment for our sins?” Many people will answer this question with a resounding, “No!” They will contend that the punishment surely does not fit the crime.

This response reveals both a lack of understand of the severity of the crime, and the character of the one against whom the crime has been committed. Such thinking deserves a few responses.

First, God alone has the right to determine what is fair. Justice is not a standard outside of God that He must uphold. Justice has been determined according to God’s holy character. We have standards of justice because God is a righteous God who establishes right and wrong Himself. God Himself is justice personified.

The ones believing in Jesus.

Yet whoever believes in Jesus does not need to fear hell. He will be eternally happy in the presence of the Lord on the new earth. Let the reality of hell be a reason for us to abhor sin and to put our trust in Jesus, and thus escape the judgment of God and the fire of hell.

Let us warn and let us plead with men and women to run to the Savior and avoid this horrendous place. Hell is awful. It’s terrifying and we need to tell people the full truth as it pertains to Hell. Let us say with Charles Spurgeon, “If sinners be damned, at least let them leap to Hell over our dead bodies. And if they perish, let them perish with our arms wrapped about their knees, imploring them to stay. If Hell must be filled, let it be filled in the teeth of our exertions, and let not one go unwarned and unprayed for.”