That isn't possible without bio-warfare. I sometimes hear people foolishly speak of a shooting "race war" in the USA but always remind them that the active phase of such an event would last about 15 minutes.
Unguarded. Scattered around the country. Any oil leaks potentially destroy them. Manufacturing backlogs of multiple years.
https://www.energy.gov/oe/addressing-security-and-reliabilit...
The only thing that's kept domestic terrorism to a minimum is that anyone smart enough to do it well has better economic opportunities.