[glax]

You have to look through the geopolitical aspect. Treaties, historically have been favorable for those who ride the high horse, bystanders gut mud slung upon them. In the 60's India was pressurized not to develop Nuclear bombs, but it was secretly known pakistan was developing it with the help of china and stolen tech. If India had signed the NPT back then, it would not have have anykind of deterrence action against Pakistan where they had full scale war and USA coming to pakistans's Aid when India was trying to liberate East Pakistan where there was full scale genocide of ethnic Bangla people going, that we now know as Bangladesh. They developed the bombs but with a no first use policy.

Now in 2019 with 2 front war with both Pakistan and china, where both party have actively militarized the border with them and playing the proxy war it was sure coming. China vetoing 2 times action against J-E-M terrorist group based in Pakistan that are active in insurgency in Jammu and Kashmir state of India. They are also actively claiming the state of Arunachal Pradesh as the territory like they did with Tibet

China has also amassed large number of military installation near the North-Eastern border of India and have actively tried en roaching into Indian territories, several kilometers sometimes into the past few year resulting in border skirmishes sometimes.

Last time India declined the UNSC seat and gave it to china & they are still regretting the the decision. They are hoping the next NPT for Space will have India's seat already reserved.

If other nations are going to play game of dual diplomacy it's leaves no option but to demonstrate show of force. India cannot afford to become Another Ukraine, Tibet or Taiwan becomes some other nation can abuse it's power.

Edit:Will provide citation in 2 hours currently in Mobile.