Let's be honest. Both sides revise history, either fabricating, taking out of context or exaggerating their points.
Well, I appreciate the sentiment, but I try to be as fair and evenhanded as possible. However, I do not knowingly engage in deception.
There are more than two sides to this issue, so your point is a gross over-simplification. But in the age of sound-bite debates and a general ignorance of how to interpret history, one almost always has to over-simplify to make concise points.
Honest historians will freely tell you they are over-simplifying and will be able to discuss the issues much more deeply than to just throw out out-of-context quotes and claim everyone else is wrong.
A number of the founders (however we want to define that group) WERE devout Christians. However that doesn't mean they wanted Christianity to be supported by the government - which is what many people wrongly assume.