The five terrorists in the video, believed to be recorded sometime before the Gulshan attack, made statements to justify their stance, criticising the democratic system and political leaders.
'If Islamic State were to get entrenched in Bangladesh and Myanmar it will have disastrous implications for India as both countries border India's northeast, a restive and volatile region,' says Rajeev Sharma.
'When we have a terrorist outfit in a neighbouring nation, we need to do whatever we can to neutralise that threat,' says Ramananda Sengupta.