Various sources are reporting actual military strikes across the border shared by Iran and Pakistan, started I believe by Iran, and retaliated by Pakistan. What issues caused these acts? Here is what AP reports.
The unprecedented attacks by both Pakistan and Iran on either side of their border appeared to target Baluch militant groups with similar separatist goals. The countries accuse each other of providing a haven to the groups in their respective territories
What is clear is that Pakistan is a nuclear power and Iran very nearly so. From the remove of North America, my primary reaction to this is a wish that both sides could lose. I had the same reaction to the Iraq-Iran war. Both parties are bad actors, imagine the happiness a conflict between them would bring India or the Saudis.
Afterthought: This situation, rather than the routine hate-Israel-and-Great-Satan could be the impetus for Iran to build its own nuclear bombs.
