Extremists can pro-actively glorify terror, openly promulgate anti-democratic ideologies, and radicalize others online—yet still stay within the law, a UK watchdog warned on Wednesday. There’s a “gaping chasm in the law” that allows such extremist activity, the Commission for Countering Extremism said in a review scrutinizing existing legislation. It called for a new legal framework to tackle the radicalization threat. An extremist can’t be prosecuted for grooming others unless they are “encouraging the commission, preparation, or instigation” of specific acts of terrorism, the review (pdf) said. “Not only have our laws failed to keep pace with the evolving threat of modern-day extremism, current legal boundaries allow extremists to operate with impunity,” Sir Mark Rowley, former head of the UK’s counter-terrorism policing, and the review’s co-author, said in a statement. “During the course of conducting this review, I have been shocked and horrified by the ghastliness and volume of hateful extremist …