There's a profound situational element here: the monument was erected in a courthouse.
Courts employ a uniquely serious, ritualistic and systematic process. It is within courts where each American's INDIVIDUAL rights and remedies are on center stage. We are individuals in that setting, Christian individuals and Shinto individuals, but we are first and foremost and ONLY Americans. Any icon celebrated in this STATE institution that infers a prejudice or advocation of any INDIVIDUAL characteristic, be it race, faith, ethnicity or gender, is a disenfranchising gesture.
The Ten Commandments could be placed in City Hall, the County Library, the Legislature or Governors Office ... but not in a courthouse. City Hall is a community institution, a Courtroom is an individual institution.
Our nations laws are based on the 10 Commandments (well, before political correctness replaced the Constitution, anyway). Doesn't it make sense to put them where those laws actually are? That's what a courthouse is. A place of those laws.
Seiously. It's late here. You're on your own.