AmyNation
Road Warrior
The person who brought suit objected to the spiritual nature of the license plate that he would be forced to use unless he shelled out more money for a specialty plate.
But it does not exhibit spiritual-ness (is that even a word?). It is a NA shooting an arrow. Looking at it for the first time, one does not see rain god or anything else. At least, I didn't.
The pic of the NA is supposedly of a statue. I will see if I can find out who the artist is that made the original that Oklahoma chose to put on a plate.
The link to the artist and the statue is in your op article.