A federal judge ruled last week that Boston City officials were justified in denying a religious group’s request to fly a Christian flag from a City flagpole. U.S. District Court Judge, Denise Casper, denied Harold Shurtleff’s request for a preliminary injunction that would force the City of Boston to fly a Christian flag from a pole at City Hall Plaza.

The U.S. Supreme Court heard arguments Monday in Walker v. Sons of Confederate Veterans, a debate over — you guessed it — the use of the Confederate flag. The First Amendment is something that gets...