So....before you call us out. Read your hindu religious text. Cousin marriage is totally allowed and very widely done in Hindu culture.
If you call us *censored* due to that. So are you.
Your Indian inferiority complex makes yiu try to copy the Christians of Europe and elsewhere, who call us *censored* due to cousin marriage, which we do.
But they don't do that because its forbidden in Christianity.
Not the genetic humbug.
For context the entire Afghanistan and central Asia does cousin marriage, and look at their physique.
Although this isn't related to the thread in question, the stance that maamu takes is one that most Paxtanis employ to defend consanguineous marriages.
I'd answer this by referring the reader to what I read sometime back about the Modus Operandi ( MO) of the Tableeghi Jamaat ( TeJ) . This organization was founded early last century to eliminate impurities ( read Hindu influences ) which were part of the way Muslims practiced their religion in the sub continent.
Their missionary activities were essentially focused on the Muslims of Nuh or Mewati Muslims who going by the standard definition of Muslims were only nominal Muslims.
They hardly read the Quran, had no Alims or Maluanas amongst them to guide them in Islamic practises & so on . As a result they celebrated both Hindu & Muslim festivals, kept the Ramadan fast which again wasn't universal among them , made the Haj if possible , indulged in intoxicants , didn't observe halal mostly or sacrificed for Eid al Azha & if they did, didn't sacrifice a cow but abstained from beef & consanguineous marriages or cousin marriages.
There were a lot of other points of differences with Orthodox Islam apart from the ones listed but for the purpose of this post I'm exercising brevity . Incidentally this is where the term Ganga Jumni tehzeeb comes from. It symbolises the half conversion to Islam.
Sufi missionaries who indulged in such conversions were often criticised by the ulema for these half baked conversions. The Sufis on the other hand were more pragmatic. Their thought was if we get them to partially convert that's one foot in the doorway. Eventually full conversion would follow. Events proved them right for a whole host of reasons that will require discussion for another day as it'd be a pretty elaborate one .
Coming back to the MO employed by the TeJ which in turn was something out of the playbook of early Islamic missionaries, the first task was the feeding of beef to the new convert after the proclamation of the Kalma Shahada.
This was important for the first test of a true convert was the casting away of ritual taboos of the previous religion to establish sincerity of conversion. In Iran the convert was supposed to torture or kill a dog since a dog is considered holy in Zoroastrianism.
Incidentally in late medieval India after the Gurus when Sikhi was faced with annihilation & they began to aggressively proselytize to increase their numbers, they used to feed neo converts with pork apart from ensuring the meat of any animal they had ( goat sheep fowl other birds) were slaughtered thru jhatka as opposed to halal. This meat was sanctified as kutha meat. This was also done to prevent spies getting into their fold .
The next item on the agenda was to arrange cousin marriages since this was a taboo among caste Hindus then & now. The logic was the same as the one on getting the convert to eating beef which is to break down old taboos & ensure full conversion to Islam .
These were the steps the TeJ missionaries adopted to ensure full conversion to Islam. As late as the 1970s those missionaries themselves admitted to being only partially successful aa they got the Mewatis to eat beef, abjure alcohol, become namaazis but couldn't pursuade the bulk of them to indulge in consanguineous marriages. And this was after 4-6 centuries after their nominal conversion to Islam.
So maamu here belongs to an Indic group who were more fully converted to Islam as compared to other groups . This is subjective as sub continental Muslims are also grave worshipers something you won't find in Arabia except for among the Shi'as which is an entirely different story altogether.
It's another matter that maamu's compatriots love their sisters a little too much even by Islamic standards since consanguineous marriages in Paxtan are among the highest in the Islamic world. Let's just say that's how Paxtanis celebrate Raksha Bandhan .
BTW consanguineous marriages are present in South India among few Hindu communities & there too it's among maternal cousins or maternal uncle & niece marriages although it's a dying tradition unlike what it is in Islam especially Paxtan where the trend is growing .
Finally Christianity doesn't prohibit consanguineous marriages it just became out of fashion before it was deemed to be medically unsafe to do so. Having said that it also wasn't custom among the majority of trbes or peoples of Europe who followed Christianity to indulge in consanguineous marriages even before their conversion nor were there considerations to do so like what the TeJ indulged in. The Renaissance & Enlightenment opened up Christian societies who did observe these practices essentially in the Middle East & possibly Southern Europe to change like no other.
Incidentally European Royalty practiced consanguineous marriages till the 20th century . The kings of Germany & UK were first cousins IIRC at the onset of WW-1 & the Russian king too was related to both kings being either their first or second cousin .
Interestingly the late Queen Elizabeth & her husband Prince Philip were distant cousins.