It's all just opinion, you just agree with them so you don't see it.
the global security landscape darkened
darkened is opinionated, non-factual language.
the international community failed to come effectively to grips with humanity's most pressing existential threats
Also opinion - what threats specifically? How did they fail to effectively "grip" the threats? Why are they humanity's most pressing threats?
This already-threatening world situation
How was it threatening? To whom?
a rise in strident nationalism
Implicating that nationalism is a negative political motivation, with no basis in fact whatsoever.
Donald Trump, made disturbing comments
More colored and decidedly non-factual language. No rationale as to how his actually rather insightful comments merit both being described in negative terms and how they advance "the world" towards war, nuclear or otherwise.