I would caution you about making generalizations.
In any case, if you are “attacking,” then people usually defend. Why do you (or anyone else) “attack” ideas? A lot of us; perhaps most of us discuss or argue about ideas.
When you attack, even if it is an idea, there is an emotion behind it that gets other people’s hackles up. It is not as if you are attacking an idea, it is as if you are attacking the person. There is no reason to attack an idea unless you mean to attack the person, as well.
Second, is the issue of belief. For most, belief is an unreasoning thing. It is not based on evidence or logic. Evidence and logic can be tested. Either it supports the idea, or it is mistaken. You can design evidentiary tests or thought experiments in order to see if there are any flaws in the idea.
A belief is not subject to these tests. It is based on emotions, not evidence or logic. It is based on the deep psychological needs of the person. So, an idea that is a belief really is the Person, and if you attack the Idea, you are attacking the Person.
My advice is to be polite with others in life. Don’t attack unless you have been attacked first. Never start hostilities. Approach others with respect. If they hold a belief, instead of attacking the belief, try to find out how the person came to hold that belief. Usually, things are much more understandable if you can get a person to talk about their personal experience. Further, you can then separate personal experience from interpretation of that experience.
The interpretation is the idea portion of a belief. Beliefs are made up of experience and interpretation. If you attack a belief, you are attacking personal experience. Which is to say, you are attacking the validity of a person’s experience. You are saying “you did not experience that!”
It’s impossible to tell someone they did not experience what they experienced and retain any credibility. You must accept their description of the experience as their perception of what happened.
Once you do that, you can separate experience from interpretation. You can do this in a number of ways. One of my favorites is to describe an experience that is very similar to the other person’s, but to also talk about how I got to another interpretation of that experience. Also, you can appeal to other authorities—perhaps scientists or scientific method, that offer different models that explain the experience.
If a you and the other person can not agree on the authority by which you interpret experience, and you can not appreciate each other’s authorities, then there really is no point in continuing any argument about interpretation. You are attacking the other person when there is no common ground for discussion. I don’t see the point, except to make enemies. Personally, I don’t like making enemies.
If I can understand where a person is coming from, I can translate their experience into something I understand, by applying my method of interpretation to their experience. I trust that people are accurately describing their perception of experience. I don’t call them crazy. I just try to understand the framework by which they interpret experience.
I believe that all interpretation frameworks have their own internal logic. With a schizophrenic, you have to believe that when they say they hear voices or have hallucinations, this is an accurate depiction of their experience. If you don’t believe people’s descriptions of experience, you have nothing on which to base communication. Anyway, that axiom is a matter of faith for me.
Then you can show them different models for interpreting experience. You might show the schizophrenic that no one else can perceive these voices. Or that the voices are harmful to them. Or that if they take some drugs, the voices go away, and that suggests that he or she should question the accuracy of the perception.
You can do the same thing with religious beliefs or any other kind of idea. However, if you don’t accept experience, you can’t talk. You can only attack. If you don’t accept any common authority for interpreting experience, you can only attack. If a battle is the only possibility, then you can enter battle or not, depending on your preference. However, I will point out that violence almost never changes people’s ideas. It may change their behavior, but not their ideas. The only thing that can change ideas is sympathy and appeal to alternative models that explain perception. Or, so I believe. That’s a model that is built on some fifty years of experience, some of it spent “attacking” other people’s ideas.