How can one deal with the spread of atheism and apostasy and the increasing number of atheists and apostates in Arab societies, and what is the solution to this problem?

Disbelievers have existed since the creation of Iblis, and their existence is not an innovation. Allah has great wisdom in their creation. A Muslim should strive to the best of their ability in inviting people to Allah and combating deviant ideologies. After that, it does not harm him if someone deviates from the path. For Allah Almighty forbade His Prophet from destroying himself with grief over the disbelievers, saying: "So do not let yourself perish in regret over them," and "Perhaps you would torment yourself to death because they do not believe."