Most christians believe that God will not send people to hell if they had never heard of Jesus, because that would be unjust and unfair, as just because they were unfortunate to be born in a culture where they don't ever hear about it they don't deserve to go to hell.
I'm sure you agree with this.
No, I don't. The Bible tells us that, except for those who, because of age (unborn, newborn, or so young as to be unable to comprehend the gospel) or mental disability (severe Down's Syndrome, etc.) are excluded, all people are "without excuse" before God.
Romans 1:18-23
18 For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who suppress the truth in unrighteousness,
19 because what may be known of God is manifest in them, for God has shown it to them.
20 For since the creation of the world His invisible attributes are clearly seen, being understood by the things that are made, even His eternal power and Godhead, so that they are without excuse,
21 because, although they knew God, they did not glorify Him as God, nor were thankful, but became futile in their thoughts, and their foolish hearts were darkened.
22 Professing to be wise, they became fools,
23 and changed the glory of the incorruptible God into an image made like corruptible man--and birds and four-footed animals and creeping things.
God will be found by anyone, anywhere who is truly seeking Him.
James 4:8
8 Draw near to God and He will draw near to you.
Proverbs 8:17
17 I love those who love me, And those who seek me diligently will find me.
Jeremiah 29:13
13 And you will seek Me and find Me, when you search for Me with all your heart.
For an example, check out the testimony of Afshin Javid:
VIDEO - Afshin Javid
There are, of course, other stories I have heard from missionaries and pastors of the remarkable way God reached out to those who were seeking Him. God is, as always, as good as His Word.
Its important to note, I think, in the passage from Romans above, that people "suppress the truth of God in unrighteousness." The implication here is that there is a fundamental awareness in every person of God's existence, which people suppress, or push out of their minds and hearts. It isn't that some people are completely ignorant of the Creator, but rather that, having some idea of His existence they choose to deny it, or warp it in accordance with their own imagination.
No one stands before God truly innocent - not even those I excepted earlier. Every person is born under the curse of Sin.
"There is none righteous, no, not one." (Ro. 3:10) Every person has a sin nature that is soon evidenced. How often I have seen young children who could not yet speak expressing unabashed selfishness. Snatching things from other children, hitting and screaming when the same is done to them - the power of sin manifests very early in we humans. Consequently, God will judge every person, according to what they knew (or could understand) of Him, and no one, save those who stand before Him clothed in the righteousness of Christ or who were unable, by reason of age or mental disability to comprehend the gospel, will escape His wrath.
Ok so stop telling people about Jesus!
Like other christians say if noone knows about it everyone will go to heaven.
Mark 16:15-16
15 And He said to them, "Go into all the world and preach the gospel to every creature.
16 He who believes and is baptized will be saved; but he who does not believe will be condemned.
The only way to make everybody go to heaven, after all you don't want anyone to burn in hell do you, is to shut down chrisanity completely.
Acts 4:12
12 Nor is there salvation in any other, for there is no other name under heaven given among men by which we must be saved."
1 John 5:11-12
11 And this is the testimony: that God has given us eternal life, and this life is in His Son.
12 He who has the Son has life; he who does not have the Son of God does not have life.
Or am I wrong? Let me know.
Profoundly, yes. See above.
Peace.