The niqab is NOT required under the Koran. It is a ME custom designed to denigrate women, designate them as male property and render them invisible. When adopted in western societies it is done to signify a middle finger to the values of western democracies...to indicate that the wearer will never integrate into society and subscribes to the view that the only law she will observe is sharia law. 
It is a vile symbol ptoclaiming that women should accept second class status...something that all eomen who fought for equality fear very deeply.
It is just as offensive to women as KKK costumes are to the Black community.
Trudeau does not seem to grasp just how offensive it is. It is NOT simply an article of clothing...it is a deeply offensive misogynistic symbol