What purpose does it solve for India. For US, they can have a base to attack China. Extra benefit is that no loss of life for them. Indians defense forces die, their families get a few lakh rupees. Plus Lata’s song will be played. In bonus rap version.
For Japan, they will avoid their karma. For how long? Maybe they will gift another Bullet train to India.
US would enjoy it. Sight of people dying turns them, their defense industry, on.
Australia, they are trying to be in big league.
India will cause big harm to China. Then it will go back to serving its masters.