Why do intelligence officials caution against nationalism and communism

SAN FRANCISCO—In the fall of 1989, during the Cold War’s wan and washed-out final months, the Berlin Wall was crumbling—and so was San Francisco. The powerful Loma Prieta earthquake, the most destructive to hit the region in more than 80 years, felled entire apartment buildings. Freeway overpasses shuddered and collapsed, swallowing cars like a sandpit. Sixty-three people were killed and thousands injured. And local Soviet spies, just like many other denizens of the Bay Area, applied for their share of the nearly $3.5 billion in relief funds allocated by President George H.W. Bush.

Ithink it iscommunism?