ok - my 5 cents - think of me what you wish
the mosque just happens to be the place the f**kwits in this situation feel comfortable/safe - if they felt safe in a public dunny then they'd probably give him the gun there
why do people doing bad shit feel safe in a mosque? .... My general impression of muslims is they let young males do pretty much anything - females are on a tight leash, they don't get away with anything, but males are seemingly free to do what they want without much control .... so I assume older people at the mosque are maybe suss of the ringleaders of this shit, but as per the usual way of life, they are never challenged and stopped .... sure the ringleaders are probably deceptive and put on the right show to keep people onside at times too, but I am willing to bet there are people wary of them
I might be totally wrong - just what I have observed