Christian's messages should focus more on love and acceptance. I think most of us realize that now, or I hope so.<<BTW, this was before most of us were born, so don't blame yourself personally pls. it just happens to be.
Before going to look at the history of Islam, it would be a good idea to first have a quick look upon the pre Islamic era and particularly the condition of Arab world before the arrival of Islam. Before the advent of Islam in Arab, the ignorance was very common in Arab. There was no concept of education in Arab, people use to bury their daughters alive, and idol worship was common, people of Arab used to worship more than 365 idols.