Define "winning"..
Say NATO bombarded ISIS territory and turned every single ISIS fighter into ashes, that wouldn't destroy the ideas that motivated them. In a few months, another group would rise up with a new leader proclaiming himself the "true" caliph and the whole ugly process would begin all over again.
Part of a war on a group like ISIS must include the destruction of their idea's that motivate the youth to join a terrorist group. Some say...the terrorist organization wants their opponents to overreact, beefing up "security" to the point of infringing on accepted freedoms. When the "security" fails, the net will be cast wider to include those suspected of encouraging (or even not opposing) the ideals of the terrorists. They hope that the government enacts so many harsh laws and carries out so many punitive reactions, (with a fair amount of innocent collateral damage), that the general citizenry will either select a new government more favorable to the ideals of the terrorists or the citizenry.
Or..
If terrorists want to turn opposing countries into police states primarily for the purpose of eroding civil rights - as opposed to turning them into police states because the effectiveness of their attacks means they are probably winning militarily - I think there would be some factual evidence for that case.
Terrorists probably don't particularly care that much about our civil rights. Unlike George W Bush, Do terrorists hate us for our freedoms.? More likely they hate us for our policies most of all, with a dash of racism/intolerance thrown in. Do they want to use fear to make us change our policies toward them, not change our policies toward ourselves?