It's all psychological. The inferiority complex will never go away. Deep down, we all know that unless Hindustan can annihilate Pakistan, the inferiority complexes of 1200 years or more can never be expunged (yes, this goes way beyond the existence of Pakistan and India as nation states - hence Indian Muslims are equally on the receiving end of this bizarre treatment).
Quite simply, anything Pakistan offers that implies tacit "superiority" will be framed in this way and rejected, along with a healthy dose of vitriol for acerbic effect. It's pretty pathetic really because natural disasters should not cause such tensions.
The blame for this lies squarely at the feet of arguably the single most developmentally immature government the world has ever seen. Troops of monkeys display more professionalism and maturity than the BJP government, who seem to litter Indian politics with bizarre ranting, islamophobia, personal vendettas and acrimonious slander. The people who voted for them behave like their papas in the BJP and because they remain locked in domination of Indian politics, people are vindicated in echoing whatever nonsense emanates from these most amateur participants in the human species as a whole.