Is the hadith that states that whoever dies of starvation as a Muslim is considered a martyr weak, and how can one respond to those who believe that God is unjust for decreeing the death of Muslims by starvation?

There is no text stating that dying of starvation is a cause for martyrdom. However, Al-Suyuti mentioned about sixty reasons for attaining this virtue, and he did not include dying of starvation among them. It is established in the Sunnah that the reward of martyrdom is granted for dying from a stomach illness, drowning, burning, or being crushed by a falling structure.

The scholars said: These types of deaths are considered martyrdom due to Allah’s grace, because of their severity and intense pain. Allah has favored the Ummah of Muhammad by making these deaths a purification for their sins and an increase in their reward.

Dying of starvation involves great pain, and it may fall under the meaning of martyrdom. Attributing injustice to Allah is an act of injustice and ignorance of His power and wisdom. Indeed, Allah created the heavens and the earth, sent down rain, brought forth fruits, subjected to you the ships and the rivers, and the sun and the moon, and the night and the day, and He has given you from all that you asked of Him. And if you should count the favor of Allah, you would not enumerate them. Indeed, mankind is most unjust, most ungrateful. And indeed, man is to his Lord ungrateful, counting calamities while forgetting the blessings of his Lord.