i_nepali,
one of the beauties of this 'free' country is it allows people to wear, eat, speak, or do anything long as they are not malignant to others. now who are we to tell them to remove hijab or whatever they want to/do wear? i don't see a rationale behind judging people by what they wear or what they believe in? we can't expect everyone to become an atheist or a non-believer, can we?

and regarding you finding people-- who cover themselves too much--potentially scary, let me tell you this on a frivolous note: remove that stupid boxer that you're wearing under your pant...what are you hiding and where you hiding big boy???