Sorry to be a bit terse, but enforcing cultural behaviors sounds like idealism and a wide road to racism to me.

To address the sexist culture around the burqa with a ban is just treating the symptom, something that I would expect from liberals, but I would hope that most of us on the Left would have a deeper analysis. Changing the economic and legal relationships that enforce patriarchy will do more to liberate women, and the burqua will fade away (most likely, but at least it'll be a free choice) over time as women will more easily be able to leave a conservative/patriarchal culture if they so choose. This avoids replacing sexism with racism.