I would have no objection to a Qu'ran verse or two that had historical significance for the area or building any more than I object to Jewish scripture of historical significance being incorporated or Christian scripture of historical significance or Buddhist sayings of historical significance or whatever. Whatever symbolism or imagery is used, however, is appropriate when it reflects the historical culture and contributions in a particular area.
But please don't change the subject here. The issue of a creche on the courthouse lawn is not one of a permanent fixture but a symbol the community has traditionally enjoyed to celebrate a nationally recognized Christian holiday. Whether or not you are Christian, so long as you are not required to contribute to it or participate in it, how does its presence violate your rights in any way?
I personally wouldn't care all that much, as I just look passed that stuff around the holidays. Most holiday decorations I see have nothing to do with religion (lights, trees, santa, rudolph presents, etc).
But I could certainly see how people would view that as government establishing christianity as their religion.
And how would it do that? Are you required to genuflect when you go by the display? Are you required to bow down in reverence? Are you required to attend church or recite any scripture or believe in God or give an offering or required to do ANYTHING because your neighbors are commemorating a special religious holiday that is meaningful for them?
If the government doesn't put it up or happens to allow historical symbolic Christian or Jewish or whatever art or decorations for anything, how is that in any way an establishment of religion? How is erasing the profound role religion has had in the tenets and history of our government, culture, development, and living out our lives as Americans NOT an endorsement of Atheism or non-religion? (Which is expressly forbidden in the First Amendment along with any other religious beliefs.)
By government only putting up christian symbols in a time of the year with more than just a christian holiday going on? Seems pretty simple to me.
I have no problem with schools teaching the historical relevence of religion and the areas that's involved with, it happened in my high school and I'm sure it's ongoing today. I have no idea how a manger on a city building lawn does that. I don't think not having a manger on a capital lawn is the same as endorsing atheism, that seems like an enormous stretch to me.