I have no doubts that the true culprits for this hack will be found and the punishment will be orders of magnitude worse than anything the truckers will receive.
Recent history does not support this view.
When left-wing railway blockades shut down the entire CN rail network, there was no "brutal and decisive" response. It took the better part of a year to resolve, and the OPP didn't enforce the court ordered injunction CN got, and the Liberal government was meeting frequently with the protestors.
https://www.cbc.ca/news/politics/marc-miller-path-forward-pr...
You're also assuming that support for mandates would be the only motive: While less likely than mandate support, someone may simply have been very angry that their life had been turned to chaos & misery by the protestors.