Why is it very important to Capitalistic Govenment system to keep all traditional religions that worshi?

If you look at it in another way it makes sense. Those types of religions are the most successful. They encourage people to be celebate until they marry one partner for life, to avoid unclean habits, to pay a tax and set up a system of government. All of these things are great ways to make your population boom. Then you kill your neighbors whose loose ual practices and unclean habits have left them under populated and diseased. Modern medicine changes the equation. That is the single biggest reason religion is losing it's grip on capitalist nations.