Referee Fired for Wearing Hijab

Wow, you can't make this stuff up.  Check out this news article.  Apparently, the Quebec Soccer Federation has upheld a local soccer association's decision to fire a teenage referee for wearing a religious head scarf while refereeing soccer.  The local association says they are "only following FIFA rules that say hijabs are a choking hazard."  Perhaps for players, but for the referee?  I looked on the FIFA site.  All I found was this article about an IFAB meeting.  At the bottom, you'll notice that the IFAB decided the hijab is addressed by Law 4 (Players equipment).  Obviously, this does not apply to referees.  What are your thoughts on this issue?  For me, I say she should be allowed to referee.  I don't see a problem.