People who have not heard about Islam are not sent to hell according to Islam.
Brief Answer
Those who do not believe in Islam can be classified into two groups:
1. Those who are termed ‘Jahil-e-Muqassir’ (lit. ‘culpable ignorant’). These are non-believers to whom the message of Islam has reached and who have understood its truthfulness. However, they are not prepared to accept the truth due to their obstinacy and stubbornness. This group deserves to be punished in Hell.
2. Those who are termed ‘Jahil-e-Qasir’ (lit. ‘inculpable ignorant’). These are non-believers to whom the message of Islam has not reached, or it has been presented to them in a very incomplete and untruthful manner. Such people will attain salvation if they are truthful to their own religion.https://www.al-islam.org/faith-and-re...slims-and-hell
I would say you lie are in the second category.
Everyone's belief is backed up by proof which the person considers sufficient proof for their belief. The proof is going to be different for each person because each person's life is different and we don't all share the same personal experiences and we don't all equally know about faith and Islam. You are atheist because you consider your reasons as proof for your belief, which I don't because personally, Islam explains it.
Christian view of Jesus: Jesus pbuh is God and the son of God who came to die for all your sins before you even committed them. You will be forgiven for all your sins for just believing in Jesus, which defeats the whole purpose of judgement day. God has sent messengers since Adam pbuh and then suddenly decided to send himself and his son in one.
Islamic view: Jesus pbuh was a Jew who came to restore the message of the Tawrat (Torah) which people forgot about. He was a messenger just like all of the other messengers of God.
Which one is the more logical? That is why Christians leave Christianity as they become educated in the west because modern day Christianity has been corrupted by man and the message has been distorted. Whereas Islam is actually growing the west, 5000 convert in the UK every year alone. That is your opinion that you have made even though you haven't read the Quran.
Here is why I believe in Islam and why it is not like any religion. Islamic concept of God:
Islam says there is only one God who we cannot imagine what He looks like. No one has seen God so therefore any images of God must be man made, this proves all religions are man made apart from Judaism and Islam. Since these two religions don't have an image for God such as idols, and don't worship any people as God in the case of Christians. But if you study Islam and Judaism then you will find they have the same main message. To believe in the one God, and their teachings on morality is exactly the same: no sex before marriage, both can't eat pork, etc. There is a slight difference between Judaism and Islam because the original Torah which contained the same message as a the Quran has been lost. There is and has been only one God, just different man made ideas about God from man made religions. Then people like Dawkins uses this as propaganda by making people think all religions are the same.