
but yk what? i just thought about it again after reading the other story sequel about the older brother, and i may not know the intentions of the author, but at the same time this could symbolize all the people and familys that actually do this exact thing unfortunately, they misuse religion to manipulate and exploit others

You seem genuine and sound pretty young (forgive me if not), so I will give you my honest opinion. I've read yaoi for almost 17 years (that is not my age), and I have seen plenty of stories located in Arabian countries, as well as other countries or islands. I can confidently say that Japanese people are very ignorant of a lot of things, and yes, most of them can be described as racists and/or xenophobic. Because they simply don't care to learm about what they depict. Here, honestly, the only thing you have is a bad writer who also likes stories with fucked up charactes.
Authors that write this badly rarely give a lot of thought to their story to do what you claim the author did. I mean, is possible, but she's such a bad writer that I don't give her enough credit to do that. She sucks!! She probably thought it was exotic to add that nationality and didn't even learn about the culture. Don't think to deep when the story is this bad, is honestly not worth it.
But also if you cannot read gays because of your culture, because is a sin for your religion or whatever, then stop doing it and read heterosexual manga instead.
Why did this have to be about muslims? It‘s literally haram to be gay/incest, why r they mentioning God after sinning like that?? I feel like this is racist.