For me, it makes a big difference whether Moore is permitting a display paid for by Private Contributions in accordance with Community Standards (towards which I would have very little objection), or raiding the Public Treasury -- into which Atheists pay taxes, too.
It's a very pedantic, niggling little concern on my part, except that's it's also an Eighth Commandment concern.
If you don't like what government funds, the answer is the ballot box, not shopping for liberal judges who will pretend the constitution means exactly the opposite of what it does.
Concede that power to judges and what you want could be next on the judicial hit list.