People need to accept the fact that this has always been a violent country, and it always will be a violent country. We are not safe, no matter how safe you think you are. There will never be peace no matter how hard you try to make it.
Humans are violent, emotional, unpredictable creatures.
You can't predict it. There is no exact science to profile a killer.
You can't predict random acts of violence.
The world isn't a safe place and it never has been.
We are born to die.
Gun bans won't change that.