Sir Bernard, who was Margaret Thatcher's press secretary, spoke out as police scaled down their operation at an anti-fracking protest site in West Sussex after four weeks of demonstrations.
He said: "It seems they want us all to live in their yurts, tepees and wigwams in a sort of glorious save-the-planet pre-industrial squalor, regardless of our manifest objections.
"If that is not totalitarianism, I don't know what is."
He said: "The problem with anti-fracking fanatics is that like other zealots they are blinkered totalitarians," and claimed the activists are "guilty of hypocrisy, utter stupidity and exaggeration".
"Their entire approach to energy is to plump for everything that does not work and exclude anything that does - coal, gas, oil and especially nuclear energy, which emits next to no CO2.
"Worse still, their long campaign has captured our limited politicians.
"The result is that short of an early shale gas bonanza we can no longer rely on any government of whatever political complexion to provide secure supplies of energy at affordable cost." Police said many of the activists who had descended on Balcombe in West Sussex to protest against an exploratory drilling site opened by energy company Cuadrilla had now left the area.
No Dash For Gas, which organised the camp, said they would continue to support the people of Balcombe and would return to the area in the future, calling the campaign a "marathon" not a "sprint".
Protesters believe the drilling could lead to fracking, which they claim has environmental risks including water contamination and small earthquakes.