Conservative ideology (holding 'traditional' values and being resistant to change) is ideologically rooted in a non-critical conflation of societal normativity and one's own subjective reality with a shared objective reality. It doesn't mean they uniquely suffer from this problem but it does make them much more susceptible to it. It also makes them, as a group, less prepared to counter it.

Its the same reason the Nazi's were so much more effective than Occupy wall street. In the later, internal dialogues and disagreement is tolerated and even valued to a much larger extent. In the former, its seen as lacking in purity and results in compliance, departure, or expulsion.