No doubt some people in Quebec still resent the SCC's holding about kirpans in schools, but since there was no evidence of offensive use of them, the ruling was pretty predictable (and right). (slaw.ca)
How do they feel about Sikhs wearing kirpans while playing soccer? (slaw.ca)
The strongest legal argument in favour of a ban on niqab's and burqa's would be on the basis of security (i.e. there is a legitimate state objective in preventing people from obscuring ones identity in public), but after the Gubaj Singh kirpan case I don't see that flying. (slaw.ca)