If an Eruv is erected inside of a metropolitan area, can it include Mosques, Churches, and other pagan places of worship? Or must it exclude these places? Can an Eruv be majority non-Jewish? If you exclude territory in an Eruv by creating a "hole": does that hole need an explicit barrier (nylon strings on fences)? Are there examples of this in the USA? What happens if there is an "open-air outdoor church park"? What happens if Christians pray inside of an Eruv in the public space outside of their church.
I'm interested in the laws about other religions and worship, and non-Jews inside of an Eruv.