Why Not?

Headline:
Netanyahu to U.S. Senator: IDF and Israeli Police Do Not Execute “Bloodthirsty Terrorists”

My question is, why not?
Isn't that what should happen to terrorists who, by definition, are bloodthirsty?
Why is Israel proud of not executing evil people?
Once upon a time they kidnapped and executed Eichmann who had no blood on his hands from personally killing anyone.
Now, they consider it moral not to kill those who attempt or actually kill us, and do their best to protect our enemies at the expense of their fellow Jews.