The question which arises here is, "How can all people be expected to believe in Allah given their varying- backgrounds, societies and cultures? For people to be responsible for worshipping Allah they all have to have access to knowledge of Allah. The final revelation teaches that all mankind have the recognition of Allah imprinted on their souls, a part of their very nature with which they are created.
In Soorah Al-A'raaf, Verses 172-173; Allah explained that when He created Adam, He caused all of Adam's descendants to come into existence and took a pledge from them saying, Am I not your Lord? To which they all replied, " Yes, we testify to It:'
Allah then explained why He had all of mankind bear witness that He is their creator and only true God worthy of worship. He said, "That was In case you (mankind) should say on the day of Resurrection, "Verily we were unaware of all this." That is to say, we had no idea that You Allah, were our God. No one told us that we were only supposed to worship You alone. Allah went on to explain That it was also In case you should say, "Certainly It was our ancestors who made partners (With Allah) and we are only their descendants; will You then destroy us for what those liars did?" Thus, every child is born with a natural belief in Allah and an inborn inclination to worship Him alone called in Arabic the "Fitrah".
If the child were left alone, he would worship Allah in his own way, but all children are affected by those things around them, seen or unseen.
The Prophet (PBUH) reported that Allah said, "I created my servants in the right religion but devils made them go astray". The Prophet (PBUH) also said, "Each child is born in a state of "Fitrah", then his parents make him a Jew, Christian or a Zoroastrian, the way an animal gives birth to a normal offspring. Have you noticed any that were born mutilated?" (Collected by Al-Bukhaaree and Muslim).So, just as the child submits to the physical laws which Allah has put in nature, his soul also submits naturally to the fact that Allah is his Lord and Creator. But, his parents try to make him follow their own way and the child is not strong enough in the early stages of his life to resist or oppose the will of his parents. The religion which the child follows at this stage is one of custom and upbringing and Allah does not hold him to account or punish him for this religion.
Throughout people's lives from childhood until the time they die, signs are shown to them in all regions of the earth and in their own souls, until it becomes clear that there is only one true God (Allah). If the people are honest with themselves, reject their false gods and seek Allah, the way will be made easy for them but if they continually reject Allah's signs and continue to worship creation, the more difficult it will be for them to escape. For example, in the South Eastern region of the Amazon jungle in Brazil, South America, a primitive tribe erected a new hut to house their main idol Skwatch, representing the supreme God of all creation. The homage to the God, and while he was in prostration to what he had been taught was his Creator and Sustainer, a mangy old flea-ridden dog walked into the hut, The young man looked up in time to see the dog lift its hind leg and pass urine on the idol. Outraged, the youth chased the dog out of the temple, but when his rage died down he realized that the idol could not be the Lordof the universe. Allah must be elsewhere. he now had a choice to act on his knowledge and seek Allah, or to dishonestly go along with the false beliefs of his tribe. As strange as it may seem, that was a sign from Allah for that young man. It contained within it divine guidance that what he was worshipping was false.
Prophets were sent, as was earlier mentioned, to every nation and tribe to support man's natural belief in Allah and man's inborn inclination to worship Him as well as to reinforce the divine truth in the daily signs revealed by Allah. Although, in most cases, much of the prophets' teachings became distorted, portions remained which point out right and wrong. For example, the ten commandments of the Torah, their confirmation in the Gospels and the existence of laws against murder, stealing and adultery in most societies. Consequently, every soul will be held to account for its belief in Allah and its acceptance of the religion of Islam; the total submission to the will of Allah.
We pray to Allah, the exalted, to keep us on the right path to which He has guided us, and to bestow on us a blessing from Him, He is indeed the Most Merciful. Praise and gratitude be to Allah,the Lord of the worlds, and peace and blessings be on prophet Muhammed, his Family, his companions, and those who rightly follow them. http://www.islamworld.net/true.html