I would like to know if niqaab must be observed in front of non Muslim females. If yes please provide details and how come this masla is not known to many even ulama.
If a non-Muslim enters the Masjid and it is not known whether he is Paak or not, will his entering be permitted? Will the people of the Masjid be sinful?
A non-Muslim is permitted to enter the Masjid as long there is some benefit or valid reason for him entering and there isn’t any indication that the person is Napaak nor is there any other harm. The people of the Masjid will not be sinful.