Every true or fake believer said that he received the revelation from God/Alah/Buda/Yahve.. because God/Alah/etc want him to believe. That mean that, because I have not received the revelation of the true God, God/Alah/etc. does not want me to believe. So where is my mistake if He decided this. Do I have the power to work against His will and to start to believe??????
P.S. I consider one of the biggest dogmatic lie the story of Juda - he is still hated by every Christian because he was following the will of God.... Please believe in who or what you want but don't tell me I am stupid for not following the same path.
And yes, most of the historical murders were done in the name of the mercy full God.