Eh, I'm more than happy to offend people by saying that, especially considering it is relevant to the point I'm making. White privilege is a thing and is remarkably relevant in this case, when white atheists are utilising that privilege (e.g. white male voices being the dominant narrative on almost any discussion, even when it has nothing to do with white men) to argue what (generally) non-white people should and shouldn't do, should and shouldn't feel. I'm guilty of it here too, being white and all.
We live in a world society that is institutionally biased towards white men, where a large chunk of them believe that they're the authority on everything and always know best, even when their contact with the people they claim to know better than is painfully limited. To me, the argument that the burqa (though its normally about a mis-labelled niqab) is innately oppressive even when Muslim women choose to wear it, is one of the most obvious cases of it.