What you have told us in your essay is the history of India in the post Islamic era, however Islam had spread to India and the land of today Pakistan only by written messages during the Reign of the Umayyad Caliph Omar Ibn Abd ElAziz who was commonly known as the Fifth wise caliph. After the spread of Islam in the Indian sub content, India experienced a long period of stability which stayed from the Umayyad dynasty to the middle of the Abbasid dynasty. After that India was drawn into a period of civil unrest and multiple revolutions which was so bloody like what you have mentioned, however you can not blame Islam for this you can only blame those crazy Sultans who done those cruel unbelievable acts, we can not blame the Christianity for bombing Hiroshima by the atomic bomb, but of course we can blame Truman for this, I hope I am clear about this. You can blame persons but you can not blame the Islamic faith itself.
You need to learn to read. This isn't my essay. Will Durant wrote it. It's in the first volume of his heavily footnoted Story of Civilization. (Amazon reviews here) You say it's the post-Islamic era he is talking about, but I can only attribute this to your difficulty with the English language. (Confusion of pre and post and/or you have trouble with the opening sentence - which I bolded.)
we can not blame the Christianity for bombing Hiroshima by the atomic bomb, but of course we can blame Truman for this
The reason we cannot blame Christianity for Hiroshima is that Christianity had nothing to do with it. No one I know of suggested that the bombing was done in Jesus' name. No one said "Praise Jesus," as he pulled the trigger, unlike the "Allah Akbar's" we here whenever one of you go killing.
No, the bombing of Hiroshima was done because we were wantonly attacked by the Japanese, and involved in a great war with them. I do not "blame" Truman, I praise him. When foreigners have no regard for American lives and/or property, we should have no regard for theirs. Your women may think it cruel to have been locked inside a burning dormitory, but you will burn with them if you misunderestimate what our response will be to your continued killing. We did the right thing in Japan and we will do the right thing in the lands of other attackers. Mark my words.