Much as I asked the other commenter, how many school shooters would need to be in the school before we believe it's valid?
Let's change the analogy: ISIS terrorists take over the MIT campus. Inside the university are 50 armed terrorists. Is it valid to now bomb the university? What if there are 100 terrorists?
There is no issue with scale here. No matter how much it scales, you won't reach a point where there is an ethical position that argues for the mass murder of people that we actually view as people. It only becomes ethical when we dehumanize the people affected.
Let's change the analogy: ISIS terrorists take over the MIT campus. Inside the university are 50 armed terrorists. Is it valid to now bomb the university? What if there are 100 terrorists?
There is no issue with scale here. No matter how much it scales, you won't reach a point where there is an ethical position that argues for the mass murder of people that we actually view as people. It only becomes ethical when we dehumanize the people affected.