And it is definitely not all qatari's - a few times when we have been there have been locals who have shouted at anyone being a nuisance. There are many wonderful Qatari's who are friendly, welcoming and helpful. Who are willing to help you find things or navigate life in qatar.
It is generally teenage boys/young males and yes - sometimes the girls too - who are ruining the experience for many people. And I for one am not silent....but as someone pointed out above - i didn't go to the cinema to get people to behave. I go to watch a film.