I think Martin Luther is sadly looking on as Satan has divided the church he began so long ago. These are truly dangerous times.
By their adherence to the three Ecumenical Creeds as well as the foundational Confessions, orthodox Lutherans believe that there is but one Holy Christian Church.
Of course, they also recognize that: in this life many hypocrites and evil persons are mingled therewith. Augsburg Confession Article IIX