I started reading this manga years ago, and to this day it's one of my favorites.
I seriously don't know what sort of issue people have with this manga, or the author, but this is beautifully written, drawn, presented, and I know that a shitton of work and research had to be done in order to present this accurately and in a way that won't disrespect the cultures shown.
The title should be obvious, it's stories about brides and their every day life. The author probably avoided including religion because Japanese are mostly uninterested in that part, and it can be easily misunderstood and very difficult to depict (especially if one is not Muslim themselves). People who think Shirin and Anis are boring and plain, refuse to see the real image presented here. Not every Islamic country follows the same traditions and rules. While Amir is a member of a nomadic tribe in the north (similar to the culture of North-Eastern Turkey, Georgia, Azerbeijan or Armenia), Anis' and Shirin's culture is closer to that of women from Saudi Arabia. It's not uncommon for men to have multiple wives there, and women generally have less freedom (especially in the past). The stories are not focused on romantic love and sexual love, but you can see hints of it everywhere. My friend who is a Muslim girl (also one who wears a hijab) loves this manga BECAUSE it doesn't show explicit love/sex scenes.
It's sad to see how people degrade the quality of this manga for whatever unimportant reasons. This is a work of fiction and I'm sure none of us have researched as much as the author did, she knows what she's doing. Cheers.