OK, my opinion of the article is that is based on a false idea that America is a Christian nation.
We are a multi-cultural, multi-religious nation where freedom for all beliefs (within the boundaries of law, of course) or even for all forms of non-belief are to be tolerated, and there is not to be favoritism of any one belief or non-belief over any other.
We are a secular nation, and the Constitution is carefully worded to reflect that. In this secular nation, the current majority religion is Christianity. That may or may not change in later centuries. But if it does change, we would not need to amend the Constitution. The Consitution is fine as it is.
The recent blend of right-wing politics with Christian religion in our country has been accompanied by proclamations that this is a Christian nation or that we should get back to being a Christian nation. Such things are not constitutional or American.
Yes the teddy-bear incident was atrocious, and there have been atrocities (far worse) committed in the name of religion. That's why we need to be sure that religion and government remain uncoupled.