LF, the missile shield is for BM why? because the re-entry speed of those missiles is a multiple of mach speeds. When cruise missiles fly at those speeds, we will have to shield ourselves against it too. And it will be difficult to counter these modern cruise missiles, because unlike BM they are terrain hugging and are guided. Also, they now have speeds greater than mach much like BM. So, they are now more deadly than BM. Their only disadvantage is they have short range. Which is the reason why China is building so many missile silos close to the Indian border in Tibet. The terrain will limit the cruise missile barrage from China but with the mid-flight correction, they can still send a good number of such cruise missiles on Indian borders. Only near the borders though. which is why we need to counter it with Anti-missile shield.
Heck, the US doesn't have an answer to Brahmos.
Unless the SR-71 blackbird's propulsion becomes a standard, fighters will be useless.
Akhand,
There is no known missile defence against the terrain hugging CMs. Also the enemy on the west don't have any large numbers of it to launch a barrage of it. Any launch can be detected by AWACs from the launch itself. And since they are subsonic, their flight time is more which gives enough time for India to scramble fighters to destroy it. We surely have more AAM than they have CMs.
I know read my response above. The missile shield will be a true missile shield, only if both BM and CM can be intercepted. To intercept supersonic CM, reaction time of the Missile Shield needs to be improved. As long as the speed of light remains the fastest and as long as the missiles travel slower than electromagnetic waves, Missile shield can be effective against cruise missiles. United States is more concerned about ABM because the threat to its territory is from BM based on its geoplitical position. Canada will not launch cruise missiles on the US and Mexico is in no position to. India doesn't have that luxury. This is a very real threat and we need to counter it.