A student needs to invest years of dedicated study to truly master their chosen subject, does anyone think Islam any different? Who can expect to be an overnight expert?
Even if a person studies a college or university course for a few years, they will still have only covered a tiny fraction of the vast percentage of material that exists on their chosen subject. While no one can deny what the student has learned, they would still not be a master of their subject.
Mastering a subject still requires years of research and personal dedication. What this means, is that almost no one is in an authentic position to judge anyone else. So please, less judging, more self improvement and personal development.
Paul Salahuddin Armstrong