Ideological totalitarian fanaticism always looks for traitors. Everyone has to think the same, if you deviate one bit from the perfectly correct line you are unacceptable. It’s how totalitarian ideology functions. It wants always more, more… because it is essentially a pathology where all realism and common sense have been ditched, and they were replaced by a self amplifying ideological vicious circle where the ideologists are now imprisoned. They don’t live in reality, Ideology is their reality, and if someone slips into reality instead of staying inside ideology, he is the enemy, because he “contaminates” it with something else, while the ideology is precisely about destroying everything else. Such kind of ideology, totally alienated from reality, must constantly purify itself. It feeds on the fight against the enemies of that ideology, because its sense of righteousness comes from fighting those who think “wrong” (This is particularly true of leftist ideologies, because they are fundamentally about battling the “evil ones” – everybody else). You are only good if you perpetually battle the “wrong” and the “evil” (according to that ideology). It is a self feeding, self sustaining motion, and they simply cannot stop and contemplate reality. They are prisoners of their self created vicious circle. Also, ideology is essentially a negation of reality, and if reality contradicts ideology, then reality is wrong because our ideology simply cannot be wrong – it is the reality.