2 Is it permissible for the people of Ahlul Kitãb and other non-Muslims to enter the mosques (masjid) and other Islamic places of worship [like husayniyya or imambargah which are not masjid]? And is it necessarily for us to enforce the hijãb on those [non-Muslim women] who do not observe hijãb and allow them to enter [the mosque or places of worship], if it is permissible?