O, the great Sharia terror!  Figure it out: some Orthodox Jews and some Christians use their traditional values in arbitration regarding family issues; why shouldn't Muslims?  The typical response is that Sharia will allow men to beat their wives and stone their daughters...which is completely misinformed, paranoid rubbish.  (Sharia has some awful elements, but also includes obligations about giving alms to the poor and protecting widows and orphans.)  Nothing that violates Canadian law or the Charter would ever be allowed.  This horror of Sharia just doesn't fly in this context.