The basic rule for using the Forum is that you use good judgment and common sense in keeping your comments and messages reasonable. Some examples of unreasonable messages may include the use of profanity, advertising or commercial purposes, competing web sites, or disparaging an individual, a race or religion, a company, or website.
Mocking the president by using symbols of faith from the Catholic church is disparaging. Rick can have his opinion, as stupid and ill-informed as it is, but he should also have to abide by the rules of the forum.