system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] What was the rest of the magical world doing during the Second Wizarding War (Voldemort's return)?

In Fantastic Beasts, we learn about the existence of MACUSA: the Magical Congress of the USA. So this raises the question: Where the hell were they when Voldemort was out slaughtering Muggles, Squibs, half-bloods, and Muggle-born? He got Albus Dumbledore killed (or at least most people think he did). He killed the Minister of Magic and used the Imperius Curse on the next. 

That part is what gets me. You could argue that, sure, there are lots of terrorists in foreign states that the world ignores, but Voldemort launched a coup, overthrew the Ministry of Magic, and *killed the Minister of Magic*: the head of a wizarding state. Why did the other wizarding governments not issue a global intervention against him?
gpt
I think you're giving wizards more credit than they deserve when it comes to organization and ability for organized action. It seems that getting involved in other nations' internal affairs is simply beyond their understanding - they're not exactly the usual 'Muricans.