Its not a religious thing as its not specifically mentioned in the Quran
The only reason I can imagine it to be worn is to create trouble and miss-trust and separate yourself from the rest of society, Or that you have a...We are better than everyone else attitude you don't deserve to see our face and eyes, If I see someone wearing it the first thing that comes to my mind is be very suspicious of that person and why are they hiding and what do they have to hide?
I don't understand it because your not doing the nice decent people in your culture any favours by wearing it as you are all being tarred by the same brush because of it.
Its not a racist thing as I would be very suspicious of anyone who covers their eyes and face in public.
I do think it should be banned and hopefully then our societies can learn to live peacefully together without being so artificially segrigated.