Greater Power
The Prophet of Islam said that God grants to gentleness what He does not grant to harshness. (Sahih Muslim, Hadith No. 2593) A law of nature is stated in these words. That is, the Creator has made the world in such a way that it works with gentleness and non-violence, not with harshness and violence. Gentleness and non-violence yield useful results, while harshness and violence bear no fruit.
Adopting the attitude of harshness and violence may vent his anger, but it is not useful for any constructive purpose. Constructive work requires a mechanism that may continue once initiated. This attribute of sustainable action is found only in non-violent methods.