They have collected the various Arabic dialects and based on the Koran collected. They have used the Koran as the basis for structuring the Arabic language.
As a result, the Arabic language has become a sacred language, a language that lives outside history and can not live with evolutionary developments.
So when you criticized the Arabic language you criticized directly the Holy Words of Allah / Qur'an. With the different Arabic dialect languages, you can interpret the Quran in various ways, according to your political endpoints of influences and domination.
Not forgetting, in Linguistics and Sociology, the language is the reflection of society in which you live.
Because the Arabic language is declared holy just like the Quran, remains beyond evolutionary History and remains a language that expresses its social, psychic and cultural life centuries ago.
The Arabic language, the mythological, metaphistical Islam and the Holy Quran are just a backward religion that lives beyond our modern and historical ways of thinking and dreaming.
All religions are the biggest mistake, that Humanity has discovered and developed in its existence on Earth.
In order to modernize Islam and adapt Islam to our human values and norms, we must first revolutionize the posterior Arabic language, with which the Quran is written.