“India, Israel Vs Iran, Pakistan, Syria, Hizbollah/Lebanon is good enough.”
Will not happen - very simplistic world-view. And somewhat wishful thinking although I would love it if the configuration stays true to what you have described.
China will stand behind the Pakis, Russia behind Syria and for good reason (Naval Bases in Gwadar and Tartarus for starters). This war won’t happen without the US and NATO taking sides with Israel.
Better for Israel and India to let Syria be off’ed by NATO and the Arab League with Russia screaming and China whining first. Then deal with Iran who will invariably put their finger on some sort of trigger vis a vis Israel and the US. Pakistan won’t lift a finger - they simply don’t have the resources.
NATO is dead beat. With the economic crisis and all they really have no juice left for a big fight. Its one thing to provide air support over Libya where enemy air defense is already depleted, and quite another thing to take the air defense of Iran and Pakistan full on. NATO is actually hoping for Israel to do something with regards to Iran. There is not a lot of diplomatic/political consensus among NATO and they are not all that reliable.
China will provide backing to Iran but is too smart to get involved in a sh!t fight. And Russian backing is only so much effective. Militarily Syria is still a pussy and Israel can easily take care of Iran even in spite of Russian/Chinese support.
As for Pakistan, all we need to do is move up a dozen infantry divisions and a couple armored and artillery divisions up their eastern border to keep them quiet. Pakistan wont even think of making a dick move.
The rest of the Muslim countries will only scream and jump up and down on the sidelines but they would be more concerned about the stability of their own regime then Israel.