Most people cannot comprehend the magnitude of telling someone to remove a religious article of clothing. The burka is not just a piece of cloth. It is a part of an identity. Worn with the understanding of the creed and for the love of religion. There is a spiritual and emotional connection. By having a ban implemented, it will create further barriers preventing the interaction between the wider social group and stigmatising the minority.
Regardless of whether you think niqab should be banned in society wholeheartedly, or removed from public spheres because it makes you feel uncomfortable and in a compromised condition, banning the niqab for the small minority of women, challenges the very foundations of female autonomy in large.