Lets view the belief system as analogous to the body.
It is made of an imperfect arrangement of components.
It is subject to intrusion by external pathogens, (bad ideas).
The belief system is made up of a myriad of ideas. For most of us this is a somewhat loosely organised conglomeration of prejudices, hunches, social conditioning and the results of contemplation.
Our belief system, as is the body, is constantly bombarded by intrusive influences. For the body it is toxins, viruses and bacterium etc.
For our belief system we have similar.
The intrusions that I wish to address are the Religious/Quasi Religious Thought Constructs.
These infections are like a virus in that they co-opt the host into promulgating the infection.
As with other parasitic diseases, these infections can lead to a whole raft of strange behaviors that are often detrimental to the host, but serve the needs of the infective agent.
We, who wish to free our fellows from the thrall of these"diseases" must seek the "anti-viral" concepts that can be safely introduced to the population to "cure" them.
Meditate on this.