The fund is not concerned about the debt ceiling. The are concerned about the US threatening invasion of its allies.
The debt ceiling is literally not a problem at all, unless the US were to do something as monumentally stupid as to stop allowing its GDP to grow through trade, and devalue the US dollar, in which case everybody flees US treasuries, resulting in collapse of value, causing more people to flee UST, etc....
The debt hawks are very wrong about the fundamentals of currency, but they are less dangerous than the war hawks in the White House to the US's economic future.
It's one thing to do a epically stupid invasion of Iraq on faked intelligence, which ally support. It's another thing entirely to invade allies. It will totally end US dominance in the world.