There's the City Of Falls Church, which is an incorporated municipality and, yes, a "small town". Then there's a surrounding suburban sprawl better called the Zip Code Of Falls Church.
The "paintball jihadis" operated from a storefront mosque that was actually within the city limits, but the vast majority of the Muslim and jihadi presence is near Bailey's Crossroads, which is technically within the Falls Church zip code but quite alien in every other respect.
If I lived there, I'd be watching. Closely.
Falls Church may be small in area, but it is part of big city America. The title is misleading.