Some of these remarks are Racist. I admit to finding anyone with their face completely covered a bit unnerving. For instance, recently, when in the supermarket car park, a man in full biker gear leapt up behind me and grabbed my shopping bags. I was somewhat alarmed until he spoke and I recognised the voice of one of my DD's friends, gallantly assisting an elderly friend to load heavy shopping into the boot. I asked him 'Are you in there Bob? and he immediately removed his helmet and goggles and apologised for giving me a fright.
I still remember the film about Ned Kelly, which gave me nightmares, with Ned in his home made 'helmet' with only a slit for his eyes. I suppose therefore that there is an inbuilt human reaction of distrust to fellow humans whose faces we cannot see.
On the other hand, there has never been a fuss or campaign against people covering their faces e.g welders, beekeepers, people with disfigurements or sunlight allergies, brides, wearers of veiled hats etc, which IMO makes the current fuss about Niqab/burqa wearers undoubtedly racist.