"Politics" is like the evil doppelgänger of "democracy," upon which people put all their frustrations and doubts about the democratic system - thus they say, politics is so dirty instead of saying democracy is so dirty (like Hitler did in Mein Kampf):
This caricature from the early 1960s illustrates how the Communists were "morally blackmailing" liberal Westerners by pointing out the presence of remnants of Authoritarian Right, like Francoist Spain and Apartheid South Africa, in their ranks: