What Should Christians Know about Islam before Interacting with Muslims?

https://www.godtube.com/resource/mediaplayer/00ejfmnu.mp4;https://content.swncdn.com/godtube/6be6b7884c58e6e55efa1718cd5694bf_720p_posters52.jpg;https://www.godtube.com/watch/?v=00EJFMNU;