Does it also depend on which "sect" (for want of a better word) the person belongs to?
For instance sunni, shia interpret things differently, and wahhabism interprets very strictly?
Genuinely interested in this.
Yes definitely. The issue with Islam that it has so many interpretations that even the core beliefs are interpreted in different ways, for example, some muslims believe only in the Koran and not the hadith so they follow a 3 times per day prayer instead of 5. Sufis, for example believe they can do the hajj (pilgrimage) anywhere in the world rather than in Mecca as hajj to them is being one with God.
If you look at Wahhabism and Khomeinism you wouldn't see such a difference in beliefs but there are some differences in ideas of interpretation and sect they follow. Wahabism is just a form of very conservative sunni belief while Khomeinism is a form of very conservative shia belief (wahhabism wears niqab, khomeinism wears chador). The differences are more political to be honest that's why they don't get a long. Then you have different school of thoughts in Sunnis, for example hanbali, hanafi, etc... while Shias have Jaafari, ismaeli etc... they also differ in interpretations.
Dr Qanta Ahmed, a British-American Muslim doctor who lives in New York, does not wear a face veil and supports a ban on them.
She said the number of women wearing them in the West is increasing in part because girls begin to wear them before they reach puberty and many were not given a choice.
By contrast, in Iran the law requires women to wear modest "Islamic" clothing. In practice, this means women must wear a chador, a full-body cloak, or a headscarf and a manteau (overcoat) that covers their arms.
There are posters in cities and towns comparing unveiled women to unwrapped candy and lollipops attracting unwanted attention from flies.
Recently, some Iranian women have protested against this law by taking off their headscarf in public. One woman was jailed for two years in March for doing this.
This is cultural and religion is it?
This doesn't mean anything. Her opinion does not constitute as fact. The whole area is very and highly subjective and everyone has an opinion or interpretation. If you ever lived in any Middle Eastern country you would know there are a lot of cultural elements in women wearing the veil. Sure some are forced to wear it by their parents, which is wrong and some have chosen to wear it by their own choice. I also met a few women who stopped wearing it because they stopped believing in it.