Violence at Capitol and beyond reignites a debate over America's long-held defense of extremist speech

With most Americans hoping this week's expected inauguration protests look nothing like the Capitol siege, questions emerge about unrestrained free expression, long championed by First Amendment theorists as a benefit to society, no matter how ugly and hateful.

The optics may be disturbing, especially so soon after the riot, with the potential of protesters -- many of like mind with those who stormed the Capitol -- screaming, or worse, at troops and police standing guard outside the razor wire-topped fences surrounding the Capitol.

Is allowing this type of expression "good"...