4) Political differences outstripped theological ones decades ago. Let’s face it: progressive Lutheran, Presbyterian, and Episcopalian congregations have a lot more in common than do progressive and conservative congregations in the same tradition. Differences over how to read the Bible, the nature of the atonement, and the character of God are far more important today than nuanced differences in polity or regarding the sacraments.
Bottom line: while I love my denominational heritage and am all for a robust theological identity and spirited theological conversation, I’d give up denominational identity and structure in a heartbeat if it meant a more unified, comprehensible, and compelling witness to the Gospel.
I don’t think that “political” is the right word in #4, but I think Dr. Lose is right that progressive churches are much more like each other than any random two churches from the same denomination.