Why do you think it is sudden? Congress, with the courts approval, have been infringing on Constitutional rights since the Constitution was written. They make exceptions all the time: when you can speak (no "fire" in a crowded theater); when you can assemble (Sorry "Occupy", move along... move along...); which guns you're allowed to buy (all without infringing on your right to keep & bear!); and when a warrant is required to execute you (Drone, zooooom, boom!).
The ends justify the means in each of those cases, so it does now too, and will again in the future.
All that shows is that we're not the 'land of the free and the home of the brave,' and never have been. Of course, things like slavery made that obvious anyway. Our government is and always was full of freedom-hating scumbags.
Nothing is ever perfect. The US Constitution sets the standard, or the bar against which the government must constantly be measured against and corrected when government strays/errs.
Through the history of the US, it has been both closer to that ideal and farther away, and in different areas and in different ways to different people at different times. Since government size has expanded so greatly since the 1920s, likewise so has its' power and control over ever more aspects of our lives and control of ever more US business, health, resource, & economic infrastructure. That expands the severity and scope of such bad government behavior.
We are in yet another moment in US history where we must decide how far we allow government power to reach, how many of our choices it can eliminate/control, and how much monitoring & control over our speech and communications it can be allowed to achieve.
Remember; If the capability exists, it will be misused regardless of any laws or oversight put in place. It's human nature, and especially human political nature.