Some idiots no longer believe in National Sovereignty. They think their beliefs will help them achieve some utopian Stark Trek United Earth Federation or something. In reality, it will simply result in various trans-nationalist empires spanning across the carcasses of former nations. While trans-nationalist Islamists would love that idea, and find Western Liberals to be Useful Idiots to help achieve such things, those who have founded countries based on ideals of freedom and equality might not be so agreeable to it.