Islam is most misunderstood religion in the world, and for sure, some of people who claim to abide by it do not contribute to helping in better understanding of Islam.
Any person honest with himself/herself, Muslim or non-Muslim, cannot argue that Islam based on its true source (Qur'an) instructs evil, supports killing out of blue, mistreatment of women, etc. It just simply does not. A lot of Muslims who also refuse to acknowlege the true nature of Islam as seen through the Noble Qur'an feed their own lack of knowledge of Islam with falsified hadiths they call "of divine nature." And, they are often very quick to call anyone infidel, blasphemer, etc. who contradicts hadith-fuelled non-Qur'anic beliefs (i.e. "honor" murders, stoning, etc).
I have a blog on wordpress called: Have You Met Islam. Although my blog is fairly new, I try to battle with common misconceptions about Islam through the light of Qur'an (the true wordly source of Islam that we have today) and some of the hadiths (that do not contradict the Qur'an).
I am not a scholar, historian, a professor, or such. So, one may leave or take what I say. But, with your translation of interpretation of the meaning of the Noble Qur'an, you are free to determine whether what I say is true or false.