The paragraph that you quoted, is soft pedaling a subtle bias against Hindus. Having noted that 'Muslims and Hindus had lived as neighbours and compatriots for over a thousand year', it goes on to state that during partition, 'peaceful Indian society' got divided into 'moderates and extremists'. Then in the following sentences it associates only Hindus with 'extremism', forgetting that 'peaceful Indian society' included Muslims as well, and there were 'extremists' within their ranks as well and that the 'mass murder' was perpetrated by both the sides in equal measure. The narrative clearly gives the impression that the 'mass murder' was one sided - Hindus, the killers and Muslims, the victims. Moderates protecting the 'migrating Muslims' and getting killed is meant to convey the subtle message that the Hindu 'extremists' so loathed the Muslims that they killed their own just because they were helping the Muslims.
It is one-sided, biased and hate-filled.