One highly doubts that she believes even slightly that islam "is not the cause of terrorism".
I believe she has been successfully blackmailed. Just before she became the import-Islam specialist of the world, she was seen in public with a look of horror and disbelief fixed on her face. She seemed to have a hard time listening when spoken to and bowed her head in horror and shock when walking around. Right around that time I read a rumor somewhere or speculation somewhere that she was being blackmailed a la dirty bomb or nuke-in-place-already and that by importing Islamists she would reduce the threat (as if they would ever hesitate to harm their own). I believe there is some blackmail somewhere - don’t know if it’s personal (her life) or a threat to stability/country (I think more likely) but IMHO she has decided she has no choice but to give in to demands.