I believe that All Christians, Muslims, and Jewish people who follow their religion in the way they have been taught and TRULY love and pray to God (whether than means praying directly to God or through Jesus as they have been taught all their life) that they will go to heaven(basically "What is in their hearts?".)
You cant say that a person, for example, who is born in the woods to a indian(Native American) tribe, that lives there all their life, no outside world, no knowledge of Islam, Judaism or Christianity, or even the idea of a "god"...goes to hell? Not their fault...
People are born into different situations, whether that be to Muslim, Christian, Jewish, parents or to people who have no concept of religion.
The idea that ONLY Christians or ONLY Jews, or ONLY Muslims will go to heaven is a man made idea...religion has become like fast food restaurants, vying for everyone's attention.