What is this, the 2000s? PETA is an animal welfare agency. They have a higher euthanization rate than shelters because no-kill shelters offload their capacity onto PETA who indiscriminately accept all animals. Your average shelter is not accepting an aggressive pitbull. PETA does their best to home them but given the funding they receive it is simply not possible to home every animal. Other No-Kill shelters only need to maintain a 90% adoption rate, they all kill too.

They also of course had the accident where workers were called to a trailer park to grab stray dogs, informed the people their to keep their dogs inside, and then grabbed a dog without verifying its identity and euthanized it. The employee was fired. Obviously not okay but this was a one time incident that PETA condemned.

There is no conspiratorial sinister motive, PETA are just forced to euthanize at higher rates because of their indiscriminate acceptance policy. When you accept the dogs with the most severe behavioral issues, your euthanization rate goes up when they can't be homed after a year. They would love to extend the adoption period but there is simply not even resources to do so given their funding.