Would your opinion be diferrent if he said he was an atheist and he displayed the monument to show how irrelevant those ancient laws are ?
Listen, its nuts to judge whether something is religous on the basis of the intent of the artist.
What if a judge said he worships the law and that the gavel he holds in his hand represents his religion. In fact the judge believes that all lawyers should likewise worship his gavel? Would the gavel need to be removed ?
I'm willing to bet some judges come pretty close to that! LOL! :)