What is happening now is the continuation of an entire history that began when Britain decided to leave India. What did it do? It divided it into two countries after supporting the Islamists for independence, despite the fact that India was a culturally and civilizationally diverse country where all ethnicities and groups lived in peace. Not content with that, colonial Britain left the disputed Kashmir region to them as a battleground. It then supported Bangladesh's independence, leaving Greater India divided into three countries. It also supported the nuclear drive in the region, turning the entire region into a volcano that could burn everyone at any moment. Who benefited from this division? Certainly not the people, but rather colonial Britain, which implemented a policy of "divide and conquer," making it easier to control without the need for a direct military presence.
Today, we continue to witness the same scene, with all the colonial powers able to take advantage of the crisis by selling weapons to all parties and fueling more religious and sectarian conflicts, turning the entire region into a weapons testing Lab. Is it in the interest of these peoples to devote all their resources to arming themselves to kill each other? As Pooya said, find the beneficiary and you will understand exactly what happened and what is still happening.
If you look at bigger picture then whenever Britain gave any country an independence or left the region after there rule is over they left a conflict to destabilise the region forever. The current conflict of Kashmir between India and Pakistan, the creation of illegal state of Israel and displacement of Palestinians from there native cities , the Cyprus issue are are all created by Britain deliberately. There is proverb about this Britain behaviour that "
If two fish are fighting in a river, a long-legged Englishman has just passed by".
Kashmir is now one of the most heavily militarised zone in the world and both India, Pakistan are spending billions of dollars on this conflict. The rivalry between India and Pakistan has gone out of control and now it's not possible for both these countries to normalise there relations, which is very unfortunate. Only if government of both countries realise this fact that there rivalry is just helping the big powers in selling there weapons. The wars and military spending's by both countries could be used to lift the living standard of millions of people in the both countries.