I have never said do this without due process. However, part of that due process is taking a person out of society to remove a potential danger. We do this all the time with criminals. They are arrested and then get their day in court at some time in the future. If they are deemed to be a real threat, they are denied bond.
We also already institutionalize people that have a mental health issue that could cause them to be a danger to others, but the standards being used to do that are ridiculously inadequate. All you have to do is look at the known history of most of these shooters to understand that. People knew they were bat **** and dangerous and no one did anything about it.
I'm not actually talking about doing something new here. I'm talking about going back to a day when a person that was obviously nuts got institutionalized. That was probably done to much then, but the pendulum has swung to far the other way and people that should not be on the streets still are... and they are killing people.
I agree with you on all that, I missed or overlooked where you said due process.