This is a normal counterterrorism deployment to the Bergen County malls for the holiday season. These rapid deployment teams have existed for many years and are part of New Jersey’s Urban Area Security Initiative (UASI), a homeland security program.

From 2018: https://theridgewoodblog.net/bergen-rapid-deployment-team-worked-the-malls-this-past-weekend/

From 2020: https://m.facebook.com/BCPONJ/videos/you-may-see-our-rapid-deployment-team-out-in-the-community-keeping-bergen-county/2761644690762955/