[1] There is a reason that people resist have their belief system interfered with. The reason is that they do not want to become schizophrenic.
It works like this. People absorb their basic world view and belief system at young ages. Very few people make up their own value system. Most get their worldview from friends in school, from parents, from television, from the movies, from collage professors,  etc. This is all along the lines of putting the circuits into a circuit board. As long as you have not put the circuit board into the oven, you can still correct wires that have the wrong alignment. Once the circuit board has been solidified, there is nothing to do with it. If you find a faulty connection and try to correct it, you end up shorting out the entire circuit board. Similarly if a person tries to correct beliefs that he finds evidence against later in life after his belief system has become hard wired, then he goes crazy--literally.

This also explains why the Orthodox world is especially wary of baali teshuva [newcomers]. They may be brilliant, and also perhaps have accepted full heartily the belief system of the Torah and Talmud, but if done after ones teenage years, then it is all just software that can easily be deleted and replaced with a highly lethal program or even a virus. Soft-ware can be hacked. Hard-ware can't be hacked.

The other reason people do not like their beliefs tampered with is because their circuit board is not alone. It is part of a supercomputer. People need to be part of a super-organism. If you tamper with their circuit board after it has been put into the oven, not only does it get an electric short circuit, but it also becomes useless for the super-organism and has to be thrown out.

Extreme examples of this are: Muslims that find themselves in an airplane driving into a building in order to murder people and themselves. Though at some point human instinct for self preservation kicks in, but it is overwhelmed by the more powerful human need to not tamper with their world view and to remain good Muslims.

The most common example is people in their first few years of college who get indoctrinated into left wing doctrines and then later in life when they see the fallacy if their beliefs simply can't let them go.

 A famous college professor expressed this thus: "Their point is that we liberal teachers no more feel in a symmetrical communication situation when we talk with bigots than do kindergarten teachers talking with their students ... When we American college teachers encounter religious fundamentalists, we do not consider the possibility of reformulating our own practices of justification so as to give more weight to the authority of the Christian scriptures. Instead, we do our best to convince these students of the benefits of secularization. We assign first-person accounts of growing up homosexual to our homophobic students for the same reasons that German schoolteachers in the postwar period assigned The Diary of Anne Frank... You have to be educated in order to be ... a participant in our conversation ... So we are going to go right on trying to discredit you in the eyes of your children, trying to strip your fundamentalist religious community of dignity, trying to make your views seem silly rather than discussable."[sic]