No. It's interesting that the Squamish Five, a 1980s group I used as a case study, were never convicted of terrorist acts. They weren't considered a terrorist group at the time. They blew up a power station in B.C. and there was a truck bombing of a Litton Industries' plant in Toronto. They were obviously a terrorist group, but there wasn't any kind of legislation in place that identified them as terrorists. They were never convicted as terrorists. They weren't charged under terrorist legislation, but law enforcement had no problem finding them, surveilling them, and stopping them. They were actually stopped on the way to a different attack in Cold Lake, Alberta, so it's not necessary to identify these activities as terrorism to effectively prevent them.
As well, there are opportunity costs that go along with identifying this is as terrorism.