Who knows? But they sure do.
What’s interesting is the phrasing, burkas are re-imagined as perfectly normal and those who find them alien or offputting are wrong and half to follow a specific etiquette in speaking of them. How on earth did the UK get to such a low point? What’s next? Things not to say to an honor killer? Things not to say to a cannibal?
One flaw (of many) with multi-culturalism is that absent assimilation as a goal diverse groups want to maintain and preserve their distinct identities because that’s where respect comes from in multiculturalism. In order to do this they may well end up mining their culture for things that will purposefully antagonize other groups.
Of course Saudi evangelism is another factor in spreading the burka, but the desire to maintain distinct identities (embodied in diverse cultural practices) is another.