Islamic countries

Q: I just need to ask you about something and that is I have found out that most of the Muslim countries are secular muslim countries and its government are secular government. I just want to ask can we call those countries and its people muslim countries and are we as muslims allowed to make the countries into muslim countries and muslim state or khalifa and make the law into sharia law and are we allowed to over throw the government and make it into muslim government and make the law into Sharia law? I have found out that the people in those muslim secular countries and its secular government that they are muslim but do we call them muslim people and muslim countries or what do we do and what do we call them?

Does a Musjid have more virtue than a jamaat khaana?

Q: If a jamaat khana is on its own property, with the property being on a 'educational trust' etc with trustees etc, like how a normal masjid would be, all salaah etc But due to the zoning not yet being passed through the municipality as a religious site, it has not yet been declared a masjid. If the permission is granted, immediately it would be a masjid. My question is, is salaah in this jamaat khana inferior to that performed in a masjid 5 minutes away?