Fears were largely around the general civil unrest and BLM rioting last summer. I've heard several women say they don't feel safe being out alone anymore, and felt the need to protect themselves. I've heard a few mothers voice concerns about protecting children as well.
I always coach people to take a gun safety course before bringing a firearm into their home. It worried me seeing so much buying based on fear. I think an armed person is better off, but having a firearm you don't understand, and bought on a knee jerk fear reaction, can be dangerous. I think the best thing I, and other gun enthusiasts, can do is get out there and educate all these new owners so that they're comfortable and safer.