I think it's everyones fair right to dress the way they want.
Do not take that to the extremes, I don't think it's acceptable for you (meaning the one who would nitpick) to walk around naked or in kkk-suit.
I also think that incoming cultures should accept the majorities culture, and not try to make a law everywhere for their own pleasing (banning of christmas carols at preschool comes to mind...).