What tends to happen with the conversation surrounding Mormonism is a focus on the minor issues. I confess that I have got mired down in this mess in conversations with Mormon friends and missionaries. But the minor issues are meaningless without first addressing the major matters of the LDS religion and Christian theology. I suggest that we within (generally accepted) Christianity need to better understand the major tenants of the Mormon doctrine, while Mormons need to understand the major tenants generally required to carry the title, Christian. I also feel it is important that we attempt to settle on some agreed definitions. All too often we are using the same words but they hold different meanings. Only after we address the major doctrines and vocabulary will we be able to get to the heart of the matter.
There is no doubt in my mind that many of us (including me) understand only a caricature of the other's beliefs. This is not to say that once we get a better understanding of the opposing position Mormons will stop sending missionaries to Christian's homes and Christians will consider Mormons inside the traditionally accepted walls of the orthodox tent; but at least our conversations will be more accurate. If indeed there are differences that mean some of us are outside salvation, then it is only expected that we would want to share a gospel that brings about salvation. On the other hand, if we find we share enough that we will all be together in God's Kingdom (and I admit that at the moment, I do not feel this is the case), than we are really just wasting our time arguing over meaninglessness.