Abullshitism is against putting people in predefined boxes prepared by people who carry the belief. To non-believers, religion is non sense, but is still all over.
People outside religions don't share the dualistic view based on the theistic position where you are either a theist or an atheist and need a label where they can feel free from being defined as holding a standpoint against different non sense ideas as if they are important.
A small piece of information. Derived from the word ken, used often in the scottish language and is synonymous with knowledge.
Person 1: "Hey I don't get this shit. How do you solve this problem?"
Person 2: "I got that one. Give me some kenlets on this assignment and I'll help you w/ that one."