I understand your question completely and my answer would be a bit sentimental, as I belong to Punjab and Punjab is a state that is stuck in disputes with other states and center too for a long time.
Regardless of what we think that " We are one nation and one country " Governments i.e. Center has been impartial to many states. Lets talk about Punjab. The dispute in the state of Punjab is for its riparian rights. As we all know Punjab was divided in 1947. Only 38% of Punjab was given to India the rest went to Pakistan and further Haryana and Himachal were separated from that share making Punjab even smaller.
As Punjab means " Panj - Five" and "Ab - waters " so it means land of Five waters( rivers) but after partition only 3 rivers were left in India Punjab. Now Punjab is a state that is highly dependent on agriculture and is really good at it too and agricultural activities requires water.
But soon after partition and during the devastating Green Revolution, Prime minister Indira Gandhi gave half of Punjab's waters to Rajashthan by making a Canal for free, Punjab was not given any compensation for its waters. Soon after that she gave half of what was left with Punjab to Haryana. Now Punjab is only left with one- fourth of its own waters. Next she ordered the construction of Yamuna-satluj canal to give half of the rest of the waters to Haryana as well.
This kind of decisions by the center is seen as tyranny and dictatorial by the state. As per the "International Water Law" - The state from where the water flows has all the Riparian rights to its waters and no body whether Internal or External can interfere with its decisions. But the decisions by the center has left Punjab with no waters of its own forcing ground water irrigation in Punjab, which caused high damage to its soil, as the water when pulled up from the ground brings along salt with it, which in turn gets deposited in the soil making it color. There is not much yield in colored land as its not fit for farming.
Moreover only 14% of the ground water is left in Punjab and still the current government supported to give the rest of the water to haryana as their own party won in haryana, if that happened Punjab will have to suffer the fate of a drought state which it already is suffering and agricultural practices would stop and even drinking water shortages as ground water has deepened and is about to be almost inaccessible.
So tell me, if we are one country, why isn't the country thinking about its own citizens, leave away language and Cricket. What is the fate of this country if this kind of thing kept haunting it. These kind of things are not reported in the media and then all the blame is put on state for it which looks like internal fighting between states. BUT WHO IS CAUSING IT ?