Hazrat Mirza Ghulam Ahmad, the Promised Messiah & Mahdi^as – the Founder of the Ahmadiyya Muslim Jamaat, says: (Read this article in Maltese)

“Even if an enemy of yours meets their death, so what? And if he remains alive, then what? To cause benefit or harm lies within the power and control of the Almighty God. No human being can cause harm to another.

Saadi has written an anecdote in his book Gulistan that someone brought the good news to Nusherwan that a certain enemy of his had been killed, and that his country and fortress had been taken over by Nusherwan’s forces. Nusherwan gave a marvellous response:

The death of my enemy brings me no joy;

For even our own life is not forever.

A person ought to reflect, what benefit and happiness can be reaped from such schemes and conspiracies? This train of thought is extremely dangerous and its cure is repentance, seeking forgiveness from God, reciting la hawl [There is no power and no strength except with Allah] and studying the Book of God. When a person is idle and inactive, this immoral mindset prevails for a very long period of time.” (Malfuzat, Vol. 2, p. 74-75)