No, he's actually not, he specifically makes his point clear... read what he said.
Here is his quote:
"What makes them an extremist? Are they an extremist before they commit an act of terrorism or once they do? Every Islamic terrorist is not associated with Isis or another terrorist group. "
They are, however,all associated with Islam.
Islam is the ideology that leads to them becoming radicalized.
They say that they are killing in the name of Islam.
Islam is the ideology they associate themselves with ...
just like Nazis associate themselves with Nazism.