The actual correct terms, generally, are these
Today’s Conservative - Classic Liberal or 19th Century Liberal
Today’s Liberal - Socialist or Social Democrat at best
A true Conservative would be a supporter of monarchy and clericalism, think 19th Century Austria-Hungary.
During the Liberal Revolutions of 1848 in Europe, the United States was a strong supporter of the revolutionary movements. Right up to Jan 2009, the US was the bastion of Classic Liberalism. The Muslim Brotherhood does not fit the bill.
They thought I was crazy for saying that those types of people are the true right-wing extremists and ultra-conservatives.
Here's the thread: