After 9/11 (and long before), the majority of historians and academia warned that the political response to terrorism — the destruction of civil liberties, implementation of mass surveillance, Islamophobia, populism — were a greater threat and risk to our freedoms than the terrorists ever were.
I remember, after the Snowden leaks, when anyone warned that governments could use the patriot act and the various other "intelligence" power grabs to destroy democracy and implement totalitarian dictatorship, they would be deemed insane conspiracy theorists. The hilarious part is most of them (including me) were warning about a distant future... yet it barely took a decade for America to collapse into fascist populism, declare ANTI-FAscists the real terrorists, and turn the surveillance apparatus against them.