Busing illegals around the country worked.
Shooting yourself in the head works to cure a headache. The reason you shouldn't do that should be obvious, as should the reason you don't terrorize human beings as a political trick.
It got Biden's attention? That's what "worked"? If you wanted to get your neighbors' attention to discuss how to deal with the creep who keeps waving his dick at everyone, you could just wave your dick at them. miSsiOn aCcOmpLisHeD!
I don't think it is intentional cruelty. More like frustration and desperation with what people in the border states are facing.
Maybe "intentional cruelty" isn't quite accurate, especially since that implies self awareness on the part of the perpetrators.
More like "inherent cruelty" to the right wing mentality and world view.