Is is not also true that we can be generous to one another across denominational lines and not attribute motives to Luther or others who are long dead?
Protestant folks who argue that their beloved anti-Christ, anti-Christian, Jewish Pharisee Approved Luther Subset of Scripture is correct are saying that the Pharisees who had absolutely no authority even within Judaism retained the right to dictate the content of the canon in spite of said Pharisees rejecting the entire New Testament which make such folks at best dissenting Pharisees, not Christians.
Like Pharisees, they divide into schools of thought with each individual choosing which rabbi (aka self appointed pastor) they prefer picking one as authoritative until their Self and Self Alone prefers another for some reason at a later date.