"They point out that it gives security agencies too much power to detain suspects without charge. They say it returns Canada to the days when the country’s spies spent much of their time playing dirty tricks against real or imagined threats.
They note that the bill’s definition of what constitutes a threat to national security is so broad that it “could include just about anything.”
Terrorism, they write, is “designed to provoke governments into making drastic mistakes.” Bill C-51, they imply, is one such drastic mistake."
Tom Walkom, Toronto Star: NDP history pushing Thomas Mulcair to oppose anti-terror bill: Walkom