The presence of mosques and other places of Islamic worship do not indicate in and of themselves locations where the sniper(s) would seek refuge. I think our sniper would act as directed by the Al Qa'eda handbook and go to a "brother's apartment" (house). The presence of worship centers, however, usually indicates a population nearby that can sustain the center - meaning there would be a substantial number of "brother's apartments" available to spirit these individuals away for a few hours or so.
That's my takeaway.
Thank you for testing my theory...something to ponder.
It seems the Palies used an IRA sniper against the Israelis.
Here is a story in a British paper that talks about this tactic..
As The Telegraph disclosed last month, the Israeli intelligence service Mossad asked British security agencies to check on the movements of known IRA killers to help identify a sniper who shot dead seven soldiers and three civilians in 25 minutes - using 25 bullets from a bolt-action rifle.