Xzins clearly points out in his post that the beliefs of the transgender do not reflect his biblical beliefs. Is the transgender “mainstream” Protestantism? It depends on how you define “mainstream”. If the transgender is “mainstream”, then xzins is not, or vice versa.
Is the National Cathedral “mainstream”, is Boston University “mainstream”?
Xzins espouses a very Biblical and nearly Catholic worldview. Is he “mainstream”?
Is the Catholic Church, as represented in the recent letter from the Abp. of San Francisco to Nancy Pelosi “mainstream”?
I think not. But again, I am wide open to correction.