How many times do you give second chances or aid and comfort to individuals who want to kill you and your loved ones? Sympathy for the guilty is TREASON to the innocent.
Midrash Tanchuma, Metzora
R. Eleazar said, “Anyone who becomes merciful upon the cruel one will end by being cruel to the merciful: It is written (I Samuel 15:9), ‘But Saul had pity upon Agag and upon the best of the sheep and the cattle’; and it is [also] written (I Samuel 22:19) about Nob the city of priests, ‘And he smote Nob the city of priests with the edge of the sword.’