One of the annoying things that always comes up when there's an argument about a theistic phrase on money, in the pledge, or on some government building is "who cares?" or "it's nothing to worry about." It may qualify as a 'little thing' in most people's eyes, but it reminds me of one statement I heard years ago on television: "Racism isn't just some KKK member putting a burning cross in your front yard. It's the gradual wearing down that happens every day." The problem with government endorsements of theism is analogous: Every school day children are compelled to say a pledge specifically modified to include a deity. Every time the president gets on the air, he talks about God. Unconstitutional endorsements get passed unanimously. All of this adds up to the perception that religion is necessary to be patriotic, and that questioning faith is therefore unpatriotic and evil. Don't think. Just believe what Big Brother believes. You've got a right to think whatever you want, but we're here to make sure thinking on your own makes things uncomfortable for you.
That is why it's immoral and unethical for a government to endorse religion. Like it or not, the people most interested in knocking over the wall of separation are in favor of bigger and bigger government, just to make sure that everyone gets the message that believing in something contrary to The State's beliefs is wrong. It's no different than what the likes of McCarthy and Stalin did, only slightly smaller in scale. For now.
Rewrite a little history. Apply a little white-out to the Constitution. Put words in the Founding Fathers' mouths. Stick a little atheist-bashing in between every religious and allegedly patriotic line to designate them as The Enemy. That's how it starts. We need to stop it before it grows beyond culturally acceptable bigotry.