For a while in the early 2000s, a nuclear war between India and Pakistan was not seen as unlikely, as result of a military standoff between the two titans over Kashmir. The fear being that that a war between the two would quickly escalate to the usage of nukes, and Pakistani President Pervez Musharraf's refusal to denounce such an possibility worried many.
What if if a flat out atomic war happened, though? As the most populated area on earth, the South Asian subcontinent engaged in nuclear warfare would be completely dreadful, with the potential of tens of millions dead. And people would want to leave for good reason. It could be the greatest refugee crisis in history, potentially displacing the dozens of times more people than the Arabic one IOTL.
How does the rest of the world react to such a crisis? How many people successfully emigrate to the West, the Middle East, and even East Asia to avoid the terrors of the world's first nuclear war? And how are they treated by their host countries? Would the anti-immigration opposition be even worse due to the numbers or would people be more sympathetic due to the unique status of "nuclear refugees"?