I think that you may have lost your focus.
All kinds of terrible tragedies occur, virtually every day of the week, somewhere.
It is never government's job to prevent all tragedies (for to do that, all liberty would be lost).
There are a couple of sayings, as crude as they may be, that describe reality:
1. Shit happens.
2. Life isn't fair.
Using your logic ("... rights can so freely intrude on an individual's right to life."), you imply that rights need to be curtailed so as to not 'intrude' on others' lives.
What happens when some deranged person runs their 5 ton box truck (or even an everyday sedan) onto a crowded sidewalk and kills many? I am sure that you would NOT support curbing everyone's ability of own and operate a 5 ton box truck (or even an everyday sedan) because one random individual killed many with it?
Same here. It is not government's role to take away any of our liberties because of the action of a random individual.
But if we took the mufflers off the 5 ton box trucks, people could hear them coming and get out of the way (Loud pipes save lives!)
Just as a bump stock does not make a semi automatic rifle a machine gun (it only allows the trigger to be pulled more efficiently, not more than one round to be fired each time the trigger is pulled) a suppressor is only a device to reduce the sound of the firearm being discharged.
As far as the Virginia Beach incident goes, the shooter has been described as having two firearms, one with a suppressor, one without, and a lady who survived in a closed office heard the shots being fired. The shooter was not particularly interested in stealth, regardless, but apparently went through the building killing either specific people or targets of opportunity. We won't know a heck of a lot about the incident unless the "focus on the victims" comes off enough to describe the incident more fully.