They cannot legally stop people from recording ICE breaking the law, but they can illegally do it. And we are seeing that now. They are claiming it is terrorism to record ICE.I hope that you're wrong and fear that you're not.
What may save us is the prevalence of cell cameras owned by individual citizens, and the Internet. They might shut down the media but they can't stop citizens from recording their law-breaking actions and posting it for all to see.
Something odd to think about, the same people who say it terrorism to record ICE say they should be allowed to break into child care facilities and record children.