First: Your claim that I am arguing that some one is inconsistent with an identity because I am trying to justify "authoritarian political positions" is begging the question. You would first need to argue that position. All you have done is claim it.
Second" Your comment also commits an appeal to motive logical fallacy. That I - or someone else for that matter - may have ill motives, leading to or concluding, an identity to be dubious, does not counter argue the position that it is.
Third: This is a Red Herring fallacy. The topic was as to whether or not a demographic you're citing as " Christian " can legitimately or justifiably hold that identity, and thus, justify your statistic. Not as to whether or not Christian views are authoritarian or justified in their Church's tax exempt status.
Forth. The argument isn't " You're not X enough, so we're going to do Y or take Z away from you " That is a strawman fallacy. The argument is: What constitutes objective truth, reality, and morality, is the best understanding of our founders intentions as expressed in our founding documents, and what is in the best objective interest of the American people as whole.
Last. I would call your deduction regarding the tax exempt status of Churches, another Red Herring fallacy, but also a little short sighted and shallow. However, I'll address it anyways.
The problem with your analysis, leading to your conclusions, regarding, the 501c3, tax exempt status of Churches, is that it doesn't take into consideration that the moral issues Churches grapple with, and political issues, overlap. This is specially true of issues regarding "gay rights" abortion, and marriage.
Also, the crux of a tax exempt status is that an organization be nonprofit - not that they necessarily be A-political. The A-political stipulation is something added as recently as 1954 by Lyndon Johnson (The Johnson Amendment) A very left leaning president who stood to benefit from such an amendment.
President Trump has talked about rolling back the Amendment. I welcome the day when he does.