Is it possible for a person who has been castrated, or whose penis has been amputated, or whose testicles have been crushed, to call people to God, or will that lead to him being harmed and ridiculed by people, leaving him with no solution but suicide?

An emasculated man, like any other Muslim, can engage in da'wah (calling others to Islam) and be productive, becoming an agent of good in his society. He is a man among men, and suicide is the shortest path to Hell. Therefore, he must be patient with what has afflicted him, for that is better for him. The Prophet, peace and blessings be upon him, said: "Wondrous is the affair of the believer, for all his affairs are good." And because great reward comes with great tribulation, whoever is content will find contentment, and whoever is displeased will find displeasure. Thus, he must be patient and not pay attention to the mockery of the ignorant.