How can people be guided to the true religion and saved from the Fire, especially in light of misconceptions about Islam and the mocking attitude towards the afterlife?

Calling to the religion of Allah is one of the greatest deeds, and it is the function of the prophets, carrying immense reward, as the Prophet, peace and blessings be upon him, said to Ali: "For Allah to guide one man through you is better for you than red camels." The call to the People of the Book focuses on clarifying that Islam is the true religion and that their beliefs which contradict Islam are false. Those who engage in dialogue with people of falsehood should be well-versed in Islamic knowledge to refute their falsehood, and a Muslim must protect his religion from doubts. The marriage of the Prophet, peace and blessings be upon him, to Aisha when she was nine years old, and his consummation of the marriage after she reached puberty, does not diminish his status.