I can see why you think RD's comments callous, when. However, I interpret them as him cutting through the dross and saying it how it is, which is what he does. Judging from the link the OP provided, she didn't really have much, if anything, to complain about, so why was she complaining? Perhaps because of abuse she had received at the hands of men earlier in her life.
I assumed that 'muslima' was a name she chose. I very much doubt if RD would introduce such a name. We really don't have the full story with this link which, it seems to me, was only put there in an anti-RD sort of way – to highlight his forthrightness rather than any actual abuse that took place in the elevator (which appears to amount to none).
RD cannot be blamed for misogynistic remarks by others, such as those to which feetle seems to be referring.
Whatever anyone thinks of RD's debating style, he is not a misogynist. Anyone who thinks so has misunderstood.