It’s a lot to do with the US military presence that’s been present for decades. In Pyeongtaek, there was also a Halloween party but it was a lot smaller scale, no danger of death. Itaewon has been the hangout spot in Seoul for the international vibe. You’re going to see and meet a large amount of people you wouldn’t find elsewhere in the country. So lots of Koreans flock there to experience something different.
Add in COVID fatigue and one of the first major celebrations in two years and you have a recipe for disaster.
Yeah... Itaewon was basically hangout place for the 8th army as it's quite close to the Yongsan Base (where it used to be till they moved to Pyeongtaek)
I remember visiting Yongsan base back in 80s and 90s. It was so very different from outside world, that it literally felt like a U.S. town inside of Seoul.
Halloween was celebrated mostly around Yongsan base and other US bases + Foreigners apartment section in Eastern Ichon dong... but it had very limited presence, and mostly for foreign kids only too, as far as I remember. No parades, nothing. Not many people really knew what it was about, and why these kids were wearing Planet of Apes masks and running around. Many folks were genuinely spooked by it back then.
Times have certainly changed - that it seems like it really became mainstream in past decade or so. I also think SNS being one factor. I stopped over Korea briefly last week and saw ton of Halloween themed stuff all over the places. Fancy resorts, all the bakeries etc... it was certainly strange to see how it became so mainstream now, even though nobody seem to understand any meaning to it. Just like why people eat KFC and cake on Christmas day in Japan.
Eitherway, hope a tragedy like this won't never happen again, and hope they learn and become more aware of danger that it's never far away. So many Koreans that I know and see, don't seem to understand nor care much of personal danger... I guess living in safe society, desensitize one's sense. When you think about it, Seoul is only like 30 miles away from Nearest NK city, Gaesung... and I would be freaked out that it's like the distance from my house in NJ to JFK airport...