
This is a serious question that many would have asked for themselves from December 2011 to this day.
I will not write many words, I will designate the main one.
You can teach others when you yourself know exactly what you will do as you say.
You can teach others when you yourself are ready to die for your words.
You can teach others if this is not chauvinism.
So, a video about the bold arcadia Babchenko: https://www.youtube.com/watch?v=5OQNVJ2W9OC