>> "Reasonable warrantless searches are compatible with the Fourth Amendment. So are searches of data shared with third parties, such as social-media posts—a highly valuable surveillance window, since people undergoing radicalization are prone to showcase their zealotry online."
This type of rhetoric really concerns me. Especially because the author tries to distance himself from beliefs that he clearly espouses by structuring his opinions into factual statements ("America is in a long war...").
He says straight out that a) Social Media is a great tool for spying on people, b) that basically we should have 'thought police' ("people undergoing radicalization" ought to be spied (with the implication that they should be sanctioned)).