The comment being responded to is BS. 'Even modorate muslims actually believe that womean sink.' That's pure BS. You might encounter it in end cases, isolated, uneducated, poor or ultra-religious sectors but on the whole it's BS.
It is just like Europeans (& others) citing Americans that think the world is flat or don't notice when you swap Russia & N. Korea on a map. "Even American geologists think the world is 5000 years old."
All these upmods haven't been delivered because the level of insight or quality of argument. It's because attacks of this kind are easy wins in 2009. It was a (probably made-up) anecdote: Even moderate muslims thinking that woman can't swim.
Just like I've said multiple times already, culture isn't sacred. Just because it's cultural doesn't mean something should be tolerated. But giving infinite rope to any 'muslim women are oppressed' line is garbage. All up, dress codes are down the list of worries.
Since you presented this 'example,' as an example I mentioned the above. It was not a criticism of you but a criticism of the fact that this example is not being treated as such. To me that is strong indication of an unhealthy bias here.
Talking about Islamic culture while ignoring the huge divide in our own country is missing something. We have our splinter groups and so do they. Once you start talking about 100+ million people you will get poets and serial killers, teachers, and racists. But we can lump them into one group and say they are good, or evil, or whatever because they are far away and we just don't know the true story.
PS: Think about a Gay man living in the deep south in 1950 now how well do you need to know them to have any idea how far the public / private divide runs with them. Now move that into a society where denouncing your faith can get you killed.