Well the only reason India is not hunting down the Martians is they don't exist. Not targeting someone because it does not exist is a very valid reason, in case you didn't know that.
Indians claim that terrorist camps exist in Pakistan yet they do not target them. Does that mean indians believe the camps do not exist? Well it's contrary to their first claim that terrorist camps exist in Pakistan.
You seem to be a young kid. Let me make it simple for you, in that, there can be other reasons why the camps are not targeted.