President George W. Bush has gotten hammered for years by many in the media for his religious beliefs. While Bush is positively secular in comparison to many presidents pre-Truman -- take a look at some of FDR's speeches, not to mention Abraham Lincoln's -- that hasn't stopped many on the left from vilifying him.
"Christianist" and "Christianism" have become the loaded terms of choice for use not only by the secular left, but also the religious left. Bestselling books have been written warning of the incipient doom that would come to all when a conservative Christians took hold of power. One wag (I'm pretty sure it was "American Fascists" author Chris Hedges, but don't hold me to that) even posited that if the late Rev. Jerry Falwell had become president one of his first moves would be to have all homosexuals executed.
President Bill Clinton, though he often spoke in religious terms, did not garner this kind of outrage or scaremongering in the mainstream media. Why? I've got two theories on that. First, a lot of God-talk can be forgiven if your policies are the "right" ones. Second, I think a lot of people in the media didn't think that Clinton really meant it, as evidenced by his serial philandering.
Which brings us to the current presidential race. Remember, Gov. Mike Huckabee's Christmas ad that had a "floating cross" which was actually a bookshelf. There was tons of media coverage and charges from the left that this was some sort of secret appeal to conservative Christians. The funny thing is, a big part of Huckabee's campaign was his overt appeals to conservative Christians -- all of the sudden the was going covert?
Which brings us to this mailer Sen. Barack Obama is sending out in Kentucky.
If John McCain had done this, there would be howls from the mainstream media. Expect this to register nary a blip.