They're just waiting for the right moment. Maybe if the Soldier killer had some cojones, and had pressed his attack into the recruiting center, or the guards at the holocaust center hadn't been quite so on the ball, they might have had enough blood to dance in.
Except for laws which allow permanent bans on keeping and bearing arms as part of a specific criminal sentence (you know that due process thing) most all current "gun" laws should not be enforced, they should be declared unconstitutional or repealed, preferably both.
There were enough dead this last spring, about 40 dead in 4 incidents, i.e. the ethnic Chinese guy from Vietnam in upstate NY, a white guy on a rampage including his family and former employer in two small towns in southern Alabama, the North Carolina nursing home massacre and another incident that escapes my recall, IIRC.
Brady et al. were foaming at the mouth. They want bills for access to medical/psychiatric records. The national rats don't want to touch the Second Amendment, except to embrace it. IMHO, they are very shy about gun control.