I've decided that infallible beliefs are my mortal enemy. I will respect people's beliefs, but I'm convince that once people decide that their beliefs are infallible, it leads to closed mindedness and inevitable conflict.
Once a person accepts that their belief is infallible, they usually become completely incapable of changing their minds. They become so drunk on the passion of their idea, that they automatically dismiss everyone else's beliefs, often by marking their beliefs as inferior. They then declare that people must respect their belief above all else. It becomes their duty in life to convert everyone to their way of thinking because it escapes their conception that what they believe is right, may not be universally right for everyone.
Even science constantly tests established beliefs, with hopes of disproving them and discovering something new about what we thought we knew.
In fact, I've decided that whenever a person accepts that their beliefs are infallible it displays a lack of cultural relativism and critical thinking on their part.