Also, abolishing your country into some superstate will not change the fact that people of europe consist of many different cultures with many different believe

Also, abolishing your country into some superstate will not change the fact that people of europe consist of many different cultures with many different believes, practices, expectations etc, and have done so for many many thousands of years. you could try to change that for macroeconomic gain, but i highly doubt that will work if we look at history.