Its never right to kill many for the suffering of 1. Hell, its never right to intentionally hurt anyone. As oppose to what Roshana below me said regarding 'the men had it coming', i really have to disagree. What happen to graciousness and forgiveness?
Besides that, i think this is a fantastic episode despite firstly being a lack of action, and also this being not the usual case that the team would take on since they always take on cases which requires their immediate action so someone else wont die/get hurt eg. aduction/kidnapping, murder etc. For this case, the killings were done already. Theres no one else thats gonna get killed in the coming months thus, this isnt the kind of cases that the team takes on usually. However, i think Rossi did a good job and there was good profiling done within the team.