Well, perhaps, FBI, DOJ, DOL, etc, you should end the H-1B genocide of white American workers in the workforce and there will be be far fewer of these rare shootings compared to the scale of what your own policies are wreaking on Americans.
These are not random events. There is a cause: your own policies.
H-1B genocide would drive any American insane.
https://www.breitbart.com/national-security/2019/08/05/fbi-warns-of-copycat-mass-shootings/