The name of the Syrian rebel counter-attack in Aleppo: who is Ibrahim Al-Yusuf

The name of the Syrian rebel counter-attack in Aleppo has a special sectarian significance to them. Here is an account (which is a bit apologetic and the writer cited the statement by the Syrian Information Minister at the time that not all those killed were Alawites as if this makes the attack non-sectarian although it was known that he said so to obscure the sectarian nature of the massacre).