Stop thinking enough time has passed that you can classily advertise a sale commemorating the murder of hundreds of people, for fuck's sake. YES IT IS TOO SOON. It will likely be too soon forever. Maybe my grandkids will think it is not too soon, but I doubt it.
Memorial Day and Veterans Day mattress sales are gross enough, but at least those holidays have been around a while. The earth has barely stopped smoking. Survivors are still alive, families of the victims are still alive, and I doubt they're honored by your really sweet deals.