As banjobabe said, CBT or cognitive therapy works best when the individual can find out answers for themselves (usually guided by the therapist). Therefore, it's hard to know exactly what was said in the session. A more helpful statement / question might be "you've previously accepted this behaviour from blah blah, given that you now have new coping strategies / you are less depressed / anxious etc, do you think you are likely to continue improving if you continue to tolerate this unaccetable behaviour?"
It's important to mention that our early experiences play a big part in this therapy. These more often than not involve parents, bully at school, brother , sister etc, and often we form opinions of ourselves based on the way one or more of these people treated us. As such, it's not that unusual to pinpoint an individual as being responsible for the patient's formation of inaccurate beliefs about themelves. However, the idea is not to hunt down a "perpetrator", but to help the patient to understand how they are not "weird / freak / mad / incurably depressed etc" but that they are just reacting as most people would if they were drip fed inaccurate (usually negative) information about themselves.
So, a hard one to judge. As has been suggested, check the registration. More importantly, if your friend is distressed about this; find another therapist. If not, encourage them to ask the therapist if they should appoint "blame" to an individual, or just try to understand their actions.
Hope this makes some sense. Best of luck.