BBC- As the crowded church was belting out hallelujahs, I stepped into the church courtyard for some fresh air.
The Muslim call to prayer was beginning to echo from the myriad of mosques all around.
I thought how this reflected the situation in Gaza in Christmas 2007 - that while the muezzin were on loudspeaker, the church bells here are played from a cassette tape.
A nervous young nun adjusted the volume - loud enough to peel through the church but not to penetrate its walls - it might risk offending Muslim Gazans passing by.
Interesting, since the purpose of a church bell is to broadcast sound out of the church, letting it's parishioners know that service is beginning.
Next up is a fireworks safety ad using a bogus terrorist group called the "Liberation Army Against Freedom" to illustrate the dangers of explosives.
The online ads, made for the Dutch government's consumer safety institute, have been made to look like a video message filmed by an Islamist military organisation called the Liberation Army Against Freedom.
Featuring a group led by an Osama bin Laden lookalike figure at their camp, the viral ads are dubbed into Iraqi-accented Arabic and have versions with subtitles in Dutch and English.
The tone is intended to be humorous, with the terrorist group seen receiving a shipment of fireworks like an arms cache, wearing suicide vests made of firecrackers, and bungling efforts to "demonstrate to you our true power" by blowing themselves up.
Here are the other three videos with English subtitles.