It's not a lack of faith. It's faith that a God is not there. You've already said there's no way to prove or disprove that God exists.
If a state judge of Alabama is a Buddhist, and his job is to decorate, then he should be able to decorate however he wishes. It's just art or an information display, for pete's sake. The next judge will change the furniture to suit his tastes.
To say that he can hang up Norman Rockwell or Pablo Picasso but he cannot hang up Salvador Dali is blatant religious discrimination. It's saying that religious opinions are less protected than other more acceptable opinions.
If people could look at it as decoration, there would be no problem. The problem arises because a few wish to make it a religious issue. I have the feeling from some of these posts that there are some who would want to change the USA into a Christian Theocracy along the lines of the Muslim Theocracies.
I am personally not offended by any religious displays. What I do take as offensive is those who wish to force their particular brand of religious believe on others.