I read about some island where the cat-haters succeeded in implementing a cat eradication program because the feral cats were killing and eating birds. After they wiped out the cats, the population of native rodents on the island exploded. The rodents got right into the bird nests and ate the eggs and hatchlings, doing far worse harm to the birds than the cats.
Way to go, cat-haters!
(Wish I could remember better details.)
Also, in Europe, several centuries ago, they thought that murdering all the cats was a great idea. They found out otherwise.
Ecosystems very often adapt to invasive species over time. It’s just at the beginning where there are some growing pains. At this point, murdering the cats may cause more harm than anything else. Those mice carry some pretty nasty diseases.
Bubonic plague.
I shoot cats all the time. Idiots along the highway dump them thinking they’re doing their pet a favor because these city fools think country life is so idyllic.
Then these cats turn feral and attack my barn cats or worse, they get killed and eaten alive by any of the variety of predators out here that think cats are tasty.
Better to just shoot them on sight and let the crows eat the leftovers.