In An The Islamic State
Their (Christians & Jews) right to practice their religion, subject to conditions.
Conditions:
While the conditions under which non-Muslims are granted citizenship of Daarul Islam are many, at this juncture we refer to only those that are relative to our discussion.
Some of these conditions are:
They may practice their religion within the privacy of their homes
They may not build any new churches, synagogues etc.
Should any church, synagogue etc. be destroyed or require repair, they may repair or rebuild such buildings.
They may not celebrate any religious festivals in public
They may not display in public any item having particular religious purport, e.g. bible, Cross, statue, etc.
Such items should also be removed from the exterior of their places of worship i.e. No idol, Cross etc may be displayed on the outside of their places of worship.
They may not ring the church bell, nor read their religious books so loud that it is audible in public.
They may not invite towards their religion.
The reason for these conditions is that the purpose of Daarul Islam is to entrench Islam on the earth. Thus the salient features in religion must only be that of Islam. No features of other religions may be observable in public.
It is only when Muslims firmly enforced such laws that Islam reigned superior on earth. Thus the object for which Daarul Islam was established had been achieved.
And from amongst these conditions are those that are related to the kuffaar concealing the evils of their religion, and not exhibiting these evils. Examples of these are the prohibition of them displaying Khamr (wine), or the church bell or yoke; the prohibition of publicly celebrating their festivals and the like thereof. Also, they may not expose any of the salient features of their religion. E.g. they may not raise their voices when reciting their scriptures. ..
(Moulana Imraan Vawda Assistant Mufti - Madrasah In'aamiyyah, Camperdown)