Mp
The Washington Navy Yard is a ceremonial and administrative center (http://en.wikipedia.org/wiki/Washington_Navy_Yard) . Nobody there was bombing anybody. The victims of the shooting were civilian contractors, making them even more removed from violence. In other words they were ordinary folks doing jobs to support their families.
In my opinion you might find it beneficial to contemplate the idea that being an arrogant, self-righteous, ignorant blowhard carries its own karmic burden.