So many Americans today mistakenly put America on par with OT Israel. Believing that this nation was founded on Christian principles, they think we must take America "back" for God. We must do this, they believe, by initiating legislature imposing Christian moral values on all American citizens, by giving Christians political power, by keeping homosexual marriages illegal, by keeping prayer in schools, by maintaining monuments of the Ten Commandments in schools, etc.
Dr. Gregory Boyd addresses this flawed mindset in this book The Myth of a Christian Nation: How the Quest for Political Power is Destroying the Church.
Every American Christian should read this book.
I wrote a post a couple months ago about this very topic (click here to read), and I found my views (almost word-for-word) throughout the entire book. Boyd's message is incredibly important in this day and age. So many Christians have lost sight of the true mission of Christ. We have lost sight of the goals for which we should be working and have become incredibly secular in our approach to spreading the love of Christ. Our methods are completely foreign to the kingdom of God, and Boyd shows this clearly and provides a Christ-like vision on which American Christians should focus their attention and effort.
He sticks so close to Scripture that, by the end of the book, doubting his overall message is quite difficult if one follows Christ's example above all. This book is sure to rattle a lot of cages (I know it rattled mine), but inside is a message we all need to hear. Even if you don't agree with everything he says (I'm still up in the air on whether or not I do), the book is thought-provoking and provides an outlook on life that--though one may not buy into 100%--is most definitely good for one's spiritual life and challenging for one's perspective on how to follow Christ's example.