Final answer:
The ideological differences opposing national health insurance are rooted in different political beliefs and concerns. Conservatives advocate for limited government intervention and individual responsibility, while progressives favor more government involvement to provide equal access to healthcare and lower costs.
Step-by-step explanation:
The ideological differences opposing national health insurance can be traced back to different political beliefs and concerns. Some conservatives, such as Republicans and southern conservative Democrats, believe in limited government intervention and individual responsibility. They argue that health care costs should be paid by individuals and that forcing everyone to pay for health insurance would be a violation of individual freedom. On the other hand, progressives believe in more government involvement and view national health insurance as a way to provide equal access to health care and lower overall costs.