Why Are Conservatives So Dishonest About the National Debt?

debt

Conservatives tout that the US inhabitant debt is an emerging crisis that will soon bankrupt the United States. What they don’t say is that a small less than half is intragovernmental debt. That is, money the US government owes itself. After WWII the US owed 120% of its GDP in public debt. At this time it only owes about 84% and that map includes the money the government owes itself. Public debt, what money the govermenet owes others, is about 60% of GDP or half the GDP to debt ratio after WWII.
Why do conservatives try to scare people about a problem that does not exist?