Heather, thank you for your reasoned response. This a complex and nuanced issue. The concerns you raise are valid however I'm wondering if you have sources or examples of how schools accommoding this has lead to the problems you describe. I'm always cautious of using Europe as an example because I find that there are as many dis-similarities as similarities between the European and Canadian experiences, cultures, and histories.

Personally I think that having the students return to a secular and diverse classroom is a good counter to any tendency to extremist thought and better than the current alternative which would take them out of a pluralistic setting and potentially serve to enhance any feelings of isolation and separateness. 

Certainly vigilance is necessary but better to fight it with inclusiveness than by further marginalization.