If "all laws can be considered to be based on morality and all abstractions of morality can be derived from various religions why are we picking only the Christian religion to showcase?

This is because many of us believe liberty and freedom is granted to us by God and not government.  Can you imagine if liberty is granted by government?  This would create an opportunity for a statist to come along and usurp the freedom allowed by God.  Taoists do not have a particular God.  Of course, not all countries allow their people freedom and liberty.  I believe enough of those people depended too much on government and not themselves.  Therefore, socialists and dictators were able to take over those countries in the name of operating under the best interests of the majority of their people.  I bet they appeased some of the wishes of the minority as long as their rules fit their statist agendas.  Just look at what we are writing about.  We are talking about appeasing a minority by making sure that we don't offend them.  These dictators help themselves.

I don't think we will ever see the Jewish star on top of post offices but I do think it is interesting how I read that an Alabama supreme court ruled to take the 10 commandments off the wall and at the same time their local government used tax payers money to build a statue of a pegan goddess.  This stuck in my mind years ago.  I looked for it on the net but I cannot find it but, here is these same theme here:

http://www.eagleforum.org/psr/2004/sept04/psrsept04.html

The ACLU is demanding that the county remove a tiny cross from its seal, one of nearly a dozen symbols it portrays. One need only look at the seal to see how ridiculous is the ACLU's demand. A third of the seal and the centerpiece is the Greek goddess Pomona standing on the shore of the Pacific Ocean. The ACLU doesn't object to her; portrayals of pagan goddesses are okay.

I think if there are enough people who don't look to themselves and God for guidance, at some point government will take over and they will become our parents.

I think there are people out there who are waiting to be offended.  They see the 10 commandments and statues of Jesus in public and they have fits.  I think they are the minority.  Do we as a nation aim to appease these people???  I say, "Get over it." because you are going to be miserable no matter what we do anyway.  This bad attitude wasn't the same attitude that helped create the constitution. 

If the statist is able to gain total power in a country, there will not be any 10 commandments anywhere in public whether the majority wants to see it near a court of law or not.  Hence, this is another example of an abstract concept of morality.  The unofficial religious view of the statist is one of power that suits their particular agenda.