Hinduism is very diverse so you would have to break it down more to understand where the hatred comes from and how we as a nation can take advantage of if. Id break it down further to the following categories:
Indian muslims (considered hindus)- Very dangerous. Must never be compromised with. Will stab you in the back at the first chance
Brahmin- This is tricky. Id split this as 50-50 for those who are more open minded and live outside the kashmir valley. Brahmins who are of pandit ancestory or who reside outside of north india can also be considered dangerous to me for their insane hatred of muslims and pakistan. Northern indian brahmin are more curious and open minded with regards to pakistan due to close genetic linkages with northern pakistan.
Congress-liberal hindu- Also somewhat dangerous but less than the 2 above. They have intense hatred for Pakistan more than muslims due to their belief that the country was partitioned and it could have been prevented. They will only appear to appease muslims due to their own political benefits but most are non-religious hindus who hate religion and are atheistic in general
Sikhs- Similar to brahmins I would put them at 50-50- Half are somewhat curious regarding pakistan/islam and may have anti-indian tendancies due to 1984. Other half are pro hindu and very anti-islam/pakistan. hard to tell where they fit in personally until you strike up a conversation with one
Bjp leaning hindus- More curious regarding pakistan/islam. Most are insecure but seem normal once you strike up a conversation. Also may change their mind or soften their tone with regards to pakistan due to genetic-linkages (northern india). The more dangerous ones would be bjp leaning hindus who are brahmin or from lower castes ie modi, advani, etc
Dalits- Most (80%) wouldnt care regarding religion and can be soft in tone towards pakistan due to not really caring about political/religious issues. if pakistan makes more of an outreach to this group we can influence indian government
South indians (non-brahmin)- Same as above but with the added caveat that they are far more open minded than other groups listed above. Along with their positive outlook on muslim rule (Sultanates of south india) they can be pretty pro-pakistan. Pakistan should make a direct outreach to these groups to gain better influence in indian govts
Let me know if I missed anything