Does a Muslim become a sinner if he kills another Muslim?

If there is a war between a Muslim country and a non-Muslim country and the Muslim country sends missiles to the non-Muslim country and there are Muslims in the non-Muslim country and those Muslims are killed, is it regarded as a murder?

Dear Brother / Sister,

Killing a Muslim is a bigger sin than the destruction of the world.

In the sight of Allah, the destruction of the world is lighter than the killing of a Muslim. (Tirmidhi, Diyat, 7; Nasai, Muharaba, 2)

If there is a war between a Muslim country and a non-Muslim country and the Muslim country sends missiles to the non-Muslim country, if Muslims also live in that country and Muslims are killed in this attack, this situation needs to be evaluated according to Islamic law.

If an attack is carried out against a country where Muslims live and if Muslims are harmed, the responsibility for this deed belongs to the attacker. However, in times of war, it is a fundamental principle of Islam that the areas where Muslims live should not be targeted and it is necessary to protect civilians.

In a legitimate war, it is necessary to attack the enemy when there is an obligation and to defend the country; unintentional harm to the Muslims present in the enemy country is permissible due to necessity; and if a Muslim dies, he is considered a spiritual martyr.

Questions on Islam