I'll stand to be wrong, but I believe in one case a member of staff and two police officers were also assaulted. Terrorism isn't necessarily about body count, it's about motivation. If the motive is political change, and the ends is violence/criminal damaged/anti-social behaviour that tends to be enough. Similar cases exist in the US, too.
I personally think its a bit of a stretch and will likely be undone. However, to pretend they are simply peaceful protests being unfairly targeted is also incorrect.