Except that Pakistanis haven't been making empty threats to India, unlike Indian FM who had to retract his hotheaded remarks immediately after Mumbai incident, and now it is Chitambaram erring in the same manner.
Chidambaram is the home minister. His ministry was caught napping when the Mumbai attacks took place. So it is a given that from now on Chidambaram will shout and scream every time there is even a remotest possibilty of an attack by LET or JEM.
By shouting and screaming he is showing the Indian electorate that his ministry is doing what it can to prevent further attacks and if attacks do take place in India, then he and his ministry are not to blame.