To expand on the Afghanistan / Pakistan war, and at risk of showing myself up for my poor knowledge of geopolitics, I think this is about Balochistan. The province at the west of Iran. But the separatists there claim part of Pakistan and Afghanistan too.
From sky, this snip:
"Khawaja Muhammad Asif said Islamabad's patience had run out as tensions escalated, with casualties reported on both sides.
"Our cup of patience has overflowed," he said in a social media post. "Now it is open war between us and you (Afghanistan)."
He alleged the Taliban had turned Afghanistan "into a colony of India", gathered militants from around the world and begun "exporting terrorism"."
Balochistan separatists have been doing terror attacks against Chinese workers and projects in the south of Pakistan. So China don't like them.
China said this yesterday re Iran:
Chinese FM responds to question of whether China will support Iran alongside Russia if the US attacks Iran - Global Times
"Mao added that China supports the Iranian government and people in safeguarding the nation's interests and legitimate rights. "
Of course they do. And of course India will be all for anything that causes pain for Pakistan. And China will not want a territorial war in Pakistan. Not when they have major road and belt stuff going on there.
I assume Pakistan are pro Iran too, because of this border tribal state.
So this is linked to Trump and Iran ? If he destabilases Iran enough, all hell might kick off.
Note, I take no sides on this. Just saying that this does appear to be a big issue for Trump.