As Apologetics guards the door to the outside, Polemics looks within. It is the discipline which addresses error inside Christendom. In Lutheranism, this is sometimes directed toward different churches and at other times toward those within Lutheran circles who are perceived by other Lutherans as being in doctrinal error.
Please submit sites which deal with theological (sytematic, exegetical, liturgical, or practical) contrasts and conflicts within the Christian Church from a Lutheran perspective, especially differences between Lutheranism and other confessions and intra-Lutheran disputes. Apologetics sites, those dealing with Christian (Lutheran) and non-Christian differences, should be submitted to that category.