At this point I can only assume that you are not operating with any standard scholarly definition of the word "burqa". There are different terms for the various modesty garments from the Muslim world for a reason.
How do you know he is using the term correctly? Seeing burqas regularly in Western Europe would be so extraordinary a thing, that assuming that he is using the term incorrectly is kinder than the other conclusion that could be drawn about his claim. From the downvoting of his posts, others too notice something is off.
