Q: If the Gospel is true, then why don’t more people believe in Jesus and become His followers? What is their main problem, in your experience? — M.C.L.
A: There are already an enormous number of followers of Jesus. Close to 30% of the world’s population are Christian. Much of the rest of the population adhere to the religious beliefs taught to them by their families, and are unlikely to abandon those beliefs for those of Christianity. Most religious people place no credence in the teachings of other religions, and I would guess that you, as a Christian, have rejected the teachings of Islam, Hinduism, Buddhism, Mormonism, etc.
If the Gospel is true, then Christians would have an obvious advantage over adherents of other faiths, because they are praying to the one true god for health, prosperity, happiness, etc. Christians are not better off than those who do not believe in and pray to the Christian god, so it is rational to conclude that the Christian god does not exist and that the Gospels are not true.
A growing number of people (from all faith backgrounds) are realizing that their belief in a god is not rational and are rejecting these beliefs. In the US., the number of people who have no religious beliefs (atheist) has doubled since 1990. This trend is even stronger among young people. The number of atheist, agnostic and humanist groups on college campuses associated with the Secular Student Alliance has increased from 42 in 2003 to 179 this year.
Feel free to leave your answer to this question in the comments.