But everyone doesn't have the same rights. Putting the ten commandments up in a courthouse is an endorsement of a specific religion.
This is the problem - you don't get that putting up the ten commandments is just putting up the ten commandments. It's NOT an endorsement of anything, much less a religion (never mind those commandments are a part of the history of more than one religion, so it would be impossible for them to be shown to endorse a specific religion in the first place).
I'm all for it. I say put verse from the Bible and Koran alongside Hindu, Buddhist, and taoist scriptures and ancient annunaki cave drawings. Throw a stature of Buddha or Vishnu up next to one of Jesus or Mohammed, Zeus, or even Gilgamesh. As long as the only limits are imposed on non-religious aspects of the materials and everyone is treated the same, there should be no problem.
To be fair, let the atheists display their artifacts too. Oh, wait, they don't have any.
My opinion: Well, too ****ing bad, stop crying about it and trying to make everyone else take their ball and go home because you decided not to bring one for yourself.