You've never been to a church.
Cathedrals have lots of space around seats so a 2000 seat could easily get benches for another 1000.
Small churches utilise all space available and, as said a small 10x30m church can accommodate 800 comfortable seats.
Lots of churches broadcast on YouTube nowadays and when overcrowded, they have a screen outside.
OTher churches use their parish centre as an overflow and have 2 services at the same time.
Don't know what point you're trying to make.
We've already established that Muslims are more religious than Christians and you distributed the medals.
You proved that you have no concept of space claiming that to have 800 people in one place you need a cathedral, then by your own numbers, you disproved that.
What else do you want to prove or disprove?