Many years ago, in the days of 800 and 900 Mhz cordless phones with those clunky retractable antennas, I also need something
How observant are they? Do they demand time off to pray five times a day? Do they protest Christians and Jews eating non-halal foods? Do they protest the female employees wearing immodest clothes? Do they protest the other employees eating in their presence during Ramadan? Those are all things that Muslims demand when they become a large enough percentage of the group.
I have no problem with Muslims who keep their religion private, just as I have no problem with Christians who don't try to enlist me in their version of Christianity and won't take no for an answer.
The Muslims I work with steal a lot less company time with their 5min prayer breaks than the vast majority of the loud gossipy locals who also work there. They take more 5-10min "breaks" than the Muslims do for their prayers. The Muslims are nice enough to tell me when it's prayer time too. These other MF'ers don't give a crap if they leave you to cover their ass while they go off to who knows where without telling you. So there's that.
No, they don't protest or bother us about any food issues whatsoever...AND WE WORK IN A HIGH END GROCERY STORE.
And here's the kicker: ANY large group which has special interests tries to dominate and get the most they can from society. Religion is just one of those things that falls under that umbrella. In my area it's sports. They don't care if youre not interested and even explicitly tell them so, but they will still talk to you about it anyway and/or treat you like youre fkd up if you rebuff them. Some people won't take no for an answer. Sometimes guys come running the bathroom together to take a leak while you're going #2...and they'll literally be screaming about football stats and speculation. LOUD. And don't me started about the perfect strangers who run up to you out of the blue, and get right in your face asking, "What's the score? Do you know the score?? Did we do a field goal???

" And it's like holy SHIT, eff off and get out of my face.
Working around people like these local Muslims is actually a relief. People who actually mind their own business, believe in the sanctity of marriage and in families sticking together and have conservative values, fairly ethical behavior and are mostly not flirtatious and are often calm and gentlemanly or ladylike with the opposite sex, compared to the trashy risque white and black American city slickers from around here. Actually, occasionally some of the Muslim conservativism is a little over the top, IMO. Like the policy to not have face to face conversations with the opposite sex (other than their own family) in public,even make much eye contact. Once a Muslim girl I work with expressed to me in our department that her son was 4 and not talking much at all. She was worried something was very wrong. She knows my son is autistic and started asking me for advice. A few days later we ran into each other in a secluded hallway. She wouldn't talk to me there! Just kept going! Wouldn't make eye contact either. But later on in the department, in "public", she was comfortable talking again. I've never asked her about that.
I used to live in NY.
The Jewish capital of the U.S..
There was a whole Hasidic Jewish village near me with several thousand of them living there. They continuously tried for years to get their tap water for free from the township, while trying to claim religious exemption for their taxes! (OMFG, really?

)And there were other things too, always trying to get their way with something and not go along with the same policies and rules that everybody else has to follow. And this whole business went back to at least the early '80s and had many ups and downs depending who was in charge of their community and also the township.
And the only other group that I saw try to do that was, alas, a Buddhist retreat. I say "Alas" because I actually really dig Buddhism and have turned to that more than any other organized faith or philosophy for direction, wisdom and release. Actually, I think it was their property manager who was trying get them exempt somehow. She was not a Buddhist, and was probably just hoping for a piece of the pie as their site manager. But it bothers me that they let her carry on like that at their organization.
It's not so much the religion which does that as it is just basic corruption, really no different than corruption in government except that the expression a d interpretation of the religion becomes corrupt, maybe while still trying to hard to portray itself as Gospel and Canon and Orthodox. And I'll admit some religions may be more susceptible to that than others, maybe more because of the succession of their leadership and morphing interpretation of their scriptures, rituals, beliefs and customs. But history shows that ALL these groups have had their dark corners and dark moments.