It seems that your observe the thnings with coloured glass on your eyes. Every body will accept that ISI has been involved in such acts since long against Indian. Now they are finding it impossible to penetrate terrorism among common Indian Muslims as they are happy being Indian rather being terrorists. So it can not be denied that to gain sympathy among common indian Muslim and world community they may have done this drastic attack. We must not forget that for spreading terrorism they have been using sucide bombers. If a person can kill himself there is little doubt that he can kill his fellow member also. Apart from this we must not forget who has specialisation in such type of blasts.