Alternatively: "Some of the people who employed some of the terrorists have seen it as a good idea to distance themselves from things that were done by their agents. On both sides."

There's a fallacy that identifies "terrorism" exclusively with anything that is done by certain "terrorist organisations". The truth is more complicated. Generally speaking in any conflict, whether in conventional war or in what is these days sometimes referred to as "asymmetric warfare", some of the things done on either sides are properly described as "terrorism", and some are not.