All the Alberta case required was a private place for their muslim students to pray, a place that was convenient to both school and students.  The school didn't offer any evidence that there was hardship involved - they just didn't want it.

Here's what the Court said in its conclusion:

"Webber Academy characterizes the tribunal’s decision as a “precedent-setting decision with far reaching implications” With respect, that is not an accurate characterization.  The tribunal applied well-established principles of law. For many years, public and private schools have been required to adhere to human rights legislation in offering their educational services to the public."