The result of the ~200-century-long unaddressed Puritan Christian fundamentalism - "If we have faith and be steadfast (stubborn) enough, we will get saved (by god)". You just have to 'have faith' and 'keep going on' because god takes care of 'hard workers' who persevere.

The denial of facts and events, stubborn insistence on the current 'belief' of the social group they belong to etc also come from the same paradigm.