Good quote about the context.
A couple of things.
1) I am frankly surprised Joe Biden is still capable of articulating thoughts like the quoted above. I think it shows his very deep experience in world affairs, despite his failing mental and physical abilities. I have to give it to him despite I HATE this guy now!
2) The quoted part MIGHT be a window into the Biden administration. Here he is mentioning China, Russia, India and Pakistan in a short time span. It wouldn't surprise me at all that there is some 'understanding' with China about the overall relationship between the two Superpowers where Pakistan is significant part.
3) As to the Pakistani nuclear weapons being potentially unsafe--- nah, Americans know the safety precautions in place, some of them were helped to put on by Americans themselves. BUT it sort of serves Pakistan's interests to keep Americans on the edge about Pakistan's nukes, bad press notwithstanding. What is new here? Haven't we heard the claims of the unsafe nukes for decades? What did Bill Clinton say about Pakistan? Then Obama? As I see it, when Americans look at China and Pakistan then Pakistan's nukes become a big factor in their decisions.
4) I don't think the Biden admin is as much of a fond of the Modi govt as Trump, Bill Clinton and Obama were of the previous Indian govts.