A couple words that come to mind are anathema and bane. As examples,

"Since the end of World War II, Communist ideology has been anathema to popular political views in the United States."

or

"Since the end of World War II, Communism has been the bane of political ideology of the United States."

A couple words that come to mind are anathema and bane. As examples,

"Since the end of World War II, Communist ideology has been anathema to popular political views in the United States."

or

"Since the end of World War II, Communism has been the bane of political ideology in the United States."