It is also said that Lutherans did not choose that name for themselves, but that it was attributed to them by their opponents. Whether that is true or not, they certainly choose it now - which is not arguable. There are such things as Missouri-Synod Lutherans, Evangelical Lutheran Church in America, etc. So I retort that my usage is sociologically normative and ought to be uncontroversial. Martin Luther was the founder and initial impetus for the movement.
Every group has a right and prerogative to name itself as it chooses.
For that matter, I could make a similar argument concerning the title Roman Catholic . The new Catechism of the Catholic Church simply uses the title Catholic throughout, and that is what most Catholics prefer. This we deny. But the point is that it is a title someone else gave us, for a particular purpose. At least an alternate should be suggested if a Lutheran insists on making a major point about terminology and self-description.