You have given a great example of Prophet Aaron.
Even a stronger condemnation of 'shirk' is this:
6:159 O Messenger! Those who break the unity of their Deen and become sects, you have nothing to do with them whatsoever. Their case will go to God and He will then tell them what they had done.
The Mullahs are crooks. During the last 25 years they have been calling 'firqas' or sects as SCHOOLS OF THOUGHT.
Ourbeacon, your own mission, has succeeded in liberating millions of Muslims world-wide from the clutches of N2I - The Number Two Islam - of the clergy.
Salam & blessings!