You appear to be forgetting that both India and Pakistan possess nuclear weapons. A war between two nuclear powers has never happened before and the results would likely be calamitous, unleashing a huge global catastrophe and unquantifiable additional conflict as food, health and energy systems fail.

I am not just some random internet person making this up. A lot has been written about this subject by respected researchers:

- https://www2.acom.ucar.edu/news/waccm-model-simulates-global...

- https://news.climate.columbia.edu/2020/03/16/even-limited-in...

- https://www.newscientist.com/article/2529589-a-nuclear-war-b...

- https://nsarchive.gwu.edu/briefing-book/india-and-pakistan-i...