Without government to assure the rights given under Christianity, Christianty would not exist as it does today.
Total crap. Christianity thrives when its members are persecuted.
Christianity exists in many countries where the government seeks to suppress religion so obviously you don't need government to support religion freedom. You just need brave people.
I have never argued that there is no role for government. Democracy is a form of government. It is just that the basis of democracy is that people rule government and not the other way around.
I disagree with your comment "Without government to assure the rights given under Christianity, Christianity would not exist as it does today."
Christianity has existed under oppressive governments, supportive governments and indifferent governments. God does not need government to do His work.