Most brakes are not efficient enough to actually put forward motion inertia on the gun when fired. It's this forward inertia that can kill "some" scopes. Some of the large, oversized shark gill type brakes, and I think some of the early Barrett brakes can actually put forward motion inertia on a rifle when fired. If your gun moves backwards *at all* when fired, then there (obviously) is no forward inertia being exerted on your rifle (and scope).

So just to say that "brakes kill scopes" is patently false. But some scopes are built to only allow for recoil in one direction. Either the crosshairs themselves, or the mechanical adjustments internal to the scope can be broken by forward inertia. Which is why many scope makers will void their warranty if you have installed their scope on a spring/air piston air rifle. Those type air rifles have forward inertia recoil, and have been known to kill scopes.

And if your barrel has a BREAK, then it's broken. If your barrel has a BRAKE, then it has a device at the muzzle that's designed to reduce recoil motion by directing muzzle pressure/gasses rearward and/or upwards.