Why Uri attacks were planned and executed, some observations:
1- To weaken Pakistan narrative at the UNGA meeting and to weaken the Pakistan-Kashmir narrative the world over.
2- To weaken the Kashmir freedom fighters narrative the world over and also at the UN meeting, hey look, they are not freedom fighters but terrorists.
3- To gain sympathy from world community, free press, media groups as for the last sixty days there were daily reports/pictures in intl' media about Indian brutalities in Kashmir.
4- The Uri attack will weaken the Kashmir insurgency, this is an Indian perspective, the mass scale support will diminish somehow.
5- India can launch a massive operation against the Kashmiri fighters on the wake of Uri attack, citing terrorism, earlier it would have been met with resistance from Indian civil society, and from world media and leaders.
6- Most important benefit, 'Blame Pakistan'. The center core policy of India for last many decades to isolate Pakistan by blaming it.
7- It happened in a Sikh community dominant area, and many killed are Sikhs, and everyone know Sikhs are kind of supporting Kashmir freedom fighters, this is to create bad blood between Sikhs and Kashmiri youths.
The point is, any False Flag operations when planned with killing its own people, army men has a multi tiered planned benefits...but the thing is it mostly fell flat on the long run and mostly have dreadful consequences for anyone indulging any such heinous staged acts.