Swatting is a lot less effective in other parts of the world for the simple reason that in other parts of the world the results are super boring. Two officers will come to the door, ask if everything is ok, perhaps ask to look around, and then leave as calmly as they arrived.
There's something unique about the style of US policing (perhaps training? perhaps military backgrounds? perhaps it being styled as militaristic?) that means these kind of incidents are always escalated by the police themselves.
If you want example just look on YT for "Police Bootcamp" videos like this:
To Americans this might not seem odd, because you've been so conditioned to view police like the military but to people from elsewhere that's uniquely military style training and conditioning and has no place in a civilian police force.
Plus the length of training in the US is unusually low[0]
There's something unique about the style of US policing (perhaps training? perhaps military backgrounds? perhaps it being styled as militaristic?) that means these kind of incidents are always escalated by the police themselves.
If you want example just look on YT for "Police Bootcamp" videos like this:
https://youtu.be/0LC6FTXAxo0?t=2m12s
To Americans this might not seem odd, because you've been so conditioned to view police like the military but to people from elsewhere that's uniquely military style training and conditioning and has no place in a civilian police force.
Plus the length of training in the US is unusually low[0]
[0] https://www.cnn.com/2016/09/28/us/jobs-training-police-trnd/...