It falls on us to guard our borders with Pakistan. We have never had a robust response to Pakistan's meddling. You hurt pakis with a disproportionate response you control rest of the problems.
India should have a declared policy that any attempt to infiltrate from the Pakistani side will be met with conventional response on paki soil.
Regards to China at the doors, well time has come for India to join a side. This non alignment wont help us. Get into a military alliance that will mean aliies being drawn in case China opens a front. We did it successfully earlier too.
Punjab insurgency was dead even when Taliban was in power in Kabul. The punjabis are simply not interested and except a very miniscule minority no one talks about it in India.
I agree with all of your points, except the last one about the Khalistanis. You see, the reason the Khalistani movement faded away was not because they went away by themselves, but because of the brutal, iron-fist approach by KPS Gill a la Operation Woodrose and Operation Black Thunder among others. This heavy-handed crackdown was the reason the Khalistanis fizzled out by the time Taliban became dominant in Afghanistan. Otherwise, the Khalistanis were killing people both before, during and even after Bhindiwala.
Secondly, I will say that it's not a minority, but a majority of the Sikhs who actually admire and defend Bhindiwala and have sympathies with Khalistan. However, it is true that it's only a minority for now, that is willing to actually pick up arms and carry out another insurgency. But the point is: THAT'S ALL IT TAKES.
Because do you think a MAJORITY of the Sikhs were involved in murdering Hindus and participating in the Khalistani insurgency under Bhindiwala and after him? No. Despite the comprehensive disruption of the entire machinery of the State, and of the normal lives of the people that the terrorists successfully engineered for over ten years, there is no reason to believe that a majority, or even a substantial proportion, of the common people, were ever behind them. Certainly, there was a measure of support in the area along the borders of Pakistan. This was largely restricted to what is referred to as the Majha region, comprising mainly the tract lying between the river Beas and the Pakistan border, and essentially covering only two districts - Amritsar and Gurdaspur. Even within these confines, support was only partial and restricted to rural areas; though submission to the terror was - at least for some time - absolute.
The large number of dissenting voices that had to be mercilessly silenced by the terrorists are evidence to the fact that their support was far - I would assert, immeasurably far - from unanimous.
Indeed, even though Hindus were the primary target, a huge number of Sikhs who refused to participate in the movement were also killed. By no means did a majority involve themselves in this. It was a minority back then too, a well-armed and well-supplied minority which managed to wreak such havoc because we underestimated and ignored them.
As long as they have a steady supply of money and arms, though they may be a minority, they will be more than capable to unleash hell on Punjab once again. The peaceful majority is not a safeguard.