Gracia, I don't see Christians as necessarily having a distinct culture.
Perhaps this statement may apply to some of the Mainline or Evangelical churches that the OP refers to, to whatever extent they have lost their culturally distinctive practices (I really don't know), but that can't possibly be true across Christianity. Even sticking just to Protestantism, since that's the OP, what of the Gaelic Psalm singing from the isle of Lewis that I presented earlier? What about the various kinds of singing associated with the different Baptists (the 'primitive', 'old regular', etc.; sorry for the scare quotes, but I don't actually know what any of these mean, I just know they have some amazing chants) -- surely these are very culturally distinctive and uniquely Christian, as they developed in the way that they did in a Christian context.
Outside of more transparently obvious things like different chant forms of different peoples, there are various culturally-distinct ways of interpreting the scriptures (say, the Alexandrian, Antiochian, and Latin hermeneutic traditions), and various ways of communicating its message. St. Patrick and the clover would be a famous example that is unique to Western Christianity. That probably would not translate well outside of areas where the clover grows. Similarly, it is a tradition of the Coptic Orthodox Church in Egypt to hang an ostrich egg before the iconostasis as a symbol of the resurrection and God's constant watching over us (as it is said that the ostrich will not take her eyes off of her eggs until they hatch). I've never heard of that in any other church, nor even seen it in any Coptic church in America (maybe ostrich eggs are hard to come by or import, or maybe they're there and I somehow haven't noticed for years).
The Gospel does not require us to adopt a particular culture.
Of course not. Why would advocating that Christians be culturally distinct from non-Christian society mean that we must all share the same culture if we are to be Christians? I didn't see that idea in anyone's posts here, so I'm a little confused why it is being brought up now, since it's not an answer to anything that anyone actually wrote. What am I missing?
One of the tragedies of American evangelicalism is confusing the Gospel with the folkways and mores of a certain segment of society.
I can imagine a few examples of that, yes, but I wonder how much of the tragedy of it is that they have done so (full stop), rather than that there appears to be so little discernment in the process concerning which parts of the culture are to be baptized and which are to be discarded, in either case for the good of the faith and those who seek it. If the gospel is to be above the folkways and mores of a certain segment of society (and I agree it is, and all churches should reflect this transcendence, as the house of God, the ark of salvation, the bride of Christ, and indeed the very body of Christ), then pretending that God is as stymied by cultural and political currents as we are isn't going to make that happen.
It appears from an outsider's perspective that at some point in the history of Christianity in the West it became completely unacceptable and downright
un-Christlike to say that your preferences, your idea(l)s, your beliefs, indeed
everything that you are must be placed in submission to Christ, baptized, crucified, and resurrected with Him. The holy scriptures counsel us: "And do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what
is that good and acceptable and perfect will of God." (Romans 12:2)
Be
transformed! This is why we
end every liturgy by praying that the Lord have mercy upon us and save us and observe our repentance and bless us. The words in the original language really drive it home as the word that is usually translated in our liturgical texts as "repentance" is the Greek "metanoia" (Coptic form: ti-metanoia), which is "changing one's mind"; in a spiritual sense, a transformative change of heart as by spiritual conversion (
source).
How is such a thing possible if we are not set apart from non-Christian cultures and societies in some ways, even (or especially) those elements of our own societies which would have us adopt an anti-Christ mindset in order to be considered good and faithful citizens?