Fly Your Flag Proudly: Religious Displays on Public Property

So I missed this last week, but the Supreme Court has decided to hear Shurtleff v. City of Boston, a case brought by a Christian group that was denied permission by the City of Boston to fly its flag, which features a Latin Cross, on a flagpole at Boston City Hall.  According to the lawsuit, the City encourages private groups to fly their flags on the city flagpole, and over the course of twelve years had allowed over 280 groups to do so, including Juneteenth and LGBTQ-related flags.  But the group claims they were denied permission solely because their flag was religious.