Like most old religions, people involve in Islamic group just follow blindly old rules, old traditions, old repetitive rites/practices,... without known very well why, they just follow their parents traditions. Quran/Qur'an is definitively an old book, but it is still used as a moral guide by Islamic groups. There are Islamic groups that still have a close interpretation of it, while others prefer a modern interpretation.
We can change everything that can provide some newimprovement of ourselves, until we achieve the bestperfection possible. That may take infinity time. We can use the wisdom of religions and still go beyond of all of that.
