Luis, from this post I understand that non Abrahamic religions don't contain what make them deserve to be criticized (degradation is not needed). Whereas Abrahamic religion deserve this for inherent elements in them. This is very biased and unfair stance.
It sure is. Non-Abrahamic religions are certainly not free from Fundamentalism.
What I am saying that that Abrahamic Faiths usually have a very poor showing at avoiding it, not that they have a monopoly on it. Unfortunately, a sizeable percentage of Abrahamists actually take pride on their Fundamentalism.
Why would any belief or religion be free from being subjected to criticism?
I can't think of any good reason myself. Criticism is needed to keep Faiths honest.
Why would we assume that if religion X is criticized it's because of its inherent mistakes but when religion Y is criticized it's only because out of hate, crudeness and love of degradation?
It is best not to assume, but rather to find out instead. Of course, it is not an either/or situation. Real shortcomings
may exist along with hate, rudeness and degradation, and may even open the way for an underserved degree of same.
Your argument about the need of religion to defend against fundamentalism or trusting the doctrine contains much contradiction.
Point it to me then, please.
If you already accept a set of beliefs, why would you stand against these beliefs that you already accepted?
So that I learn to improve them, basically.
Accepting these beliefs then standing against them is nothing but schizophrenia.
That is probably true for some very specific beliefs, or some sorts of criticisms. But not in the general case. Questioning begats trustworthness.
Why would Islam or other religion call for this exactly? Why would a religion call its followers for standing against it's fundamentals and principles?
I don't know that it would, at least not in those exact terms.
Either you accept them or not. Either you're a Muslim or not.
Blind acceptance, however, is generally unhealthy. All the more so in religious matters.
If religion taught people to distrust its "doctrine", then it means it calls people not to follow it, in the first place.
Not really, although it depends on what exactly you mean by distrust. The best kinds of faith are those that were attained by challenging belief.
If you believe in a value you should help your neighbour, how come you distrust this value at the same time? And if you fully accept this value and teaching, does this mean you are devoid of intellect and wisdom?
Not necessarily. One may have questioned it and found it worth keeping. Indeed, that is IMO the desirable course of action.
Lastly, if Islam is a higher ideal that can't exist on earth, then Muslim tradition refers to what? I need a definition.
Muslim tradition, which I usually call Islam out of habit, is what does actually and demonstrably exist among those who love Islam. It is the painfully non-perfect, non-transcendent (but often admirable and highly inspiring) body of practices, beliefs, deed and people that aim to follow Islam.