Commenting on the G&M article:

"On Monday, Chief Justice Beverley McLachlin undid that exclusion. "

"But on Wednesday, Justice Wagner offered an explanation to The Globe and Mail. He said the court had initially allotted one day for the hearing. From 26 applicants, he chose nine, among which he believed the views of LGBTQ advocates were well represented. But when he was made aware of concerns on social media, he sought out Chief Justice McLachlin to see what could be done."

Seems pretty clear that his decision was over ridden by mob pressure and the Chief Justice. Wagner said so himself.

"“There was no intent to exclude. I was convinced that some intervenors for which I accepted the application in fact will convey the interests, preoccupations and concerns of members of the LGBTQ” community. “You have to decide sometimes. It’s a judgment call, and that’s what I’ve done.”"

Either respect the judgement of a SCC justice, or get rid of the lot of them and leave justice to mobs.