Full scale war with "US"? I hope that jingoism provides you with much needed confidence that you need. China, sir is never going to fight rented war unlike Pakistan. Chinese premier's arrival is not sure as of yet.
And India does not do proxy stuff. This 'proxy war from India' is a phenomena created by so called intellectuals like ZH and HS, to make Pakistani people feel good and gain higher moral ground in case of a terrorist attack, which would be result of your own jihad factory. And your public started liking this Boogey Man stuff, which pressurized your gov and forces to repeat this kind of ranting on every forum without any substantial proof, which in turn is the reason of international embarrassment on a greater scale after OBL raid.
These kind of idiotic threats are good enough for mental masturb@t!on only. Go ahead, do it for that is what makes you happy in real world problems.