How was communism considered a threat to democracy

While the first Cold War was fought against communism, a successor Cold War is steadily unfolding against democratic electoral outcomes unfavorable to America's perceived interests. Russian President Vladimir Putin's illegal occupation of Crimea has for now revived raging Western memories of Joseph Stalin's top-down incorporation of the former Eastern Europe. Lost in the new anti-Russian narrative, however, is the growing US pattern of ignoring democratic electoral outcomes where they are inconvenient, in the name of "promoting democracy." Ultimately this process of "democracy through intervention" reinforces bureaucratic authoritarian trends in both East and West. The thrust of this US foreign policy mirrors conservatives’ efforts at home to limit and divide the ascending multicultural American political majority. 

It should be remembered that Al Gore's election by a half-million vote majority in 2000, and his apparent win in Florida that year, did not prevent Republican mobs, Republican apparatchiks and Republican judges from forcing the Bush Era upon America. Many of those same forces are willing to do whatever is necessary abroad to thwart democratic electoral outcomes not to their liking.  

The answer is installation.