If you lived under a rock and never heard of Christianity or Revelations, this plate would be completely meaningless to you aside from looking like 3 sixes. Seems strange to come after this guy over it. I'm atheist. Does that mean I still have to avoid meat on Friday's, not eat pork, not eat shellfish, not eat steak, give the church whatever percentage of my salary it is these days? This is ridiculous.
I don't know the laws of Ontario though, so I can't really speak on the separation of church and state mentioned in the article.
***EDIT
The separation of church and state thing I read was in a comment, not the article