The Religious Beliefs of America's Founders: Reason, Revelation, Revolution (American Political Thought) by Greg Frazer, professor at Master's College is much better. It actually applies historical principles and deals honestly with history.
One's view matters and has an impact on others. The deciding factor is if there is data or objective proof to back it up. David Barton provides a plethera of quotes going back to the signing of the Declaration and the drafting of the Constitution to show the true intent of these framers.
I loved this book!!! Once I started reading it I couldn't put it down. This is a must read for every American. American history has been rewritten to remove God when it is His Divine Providence that helped us found this nation. This book helps to shine the light on all the lies that have been told. If you have children, make sure you share this book with them.