No I'm not. Classical liberalism so called, is the same as modern liberalism with regard to the institutions. The institutions of so-called classical liberalism are the same institutions we have today, nothing at all has changed with regard to the liberal institutions.
Classical liberalism so called refers to capitalism, which is an economic theory, not a political theory and not a moral theory and not a legal theory. Capitalism was able to grow in the soil of liberalism like it never could in illiberal polities under illiberal regimes like absolute monarchism or pure democracy, so that's my guess as to why it quickly became equated with "classical liberalism". Capitalism, and not liberalism, has been under fire by some people politically and philosophically, ever since it was first identified as a distinct economic policy. The only people who are enemies of liberalism are the Chinese and North Koreans and other inherently illiberal polities. They don't believe in human rights, so they don't believe in liberalism, so they don't believe in the liberal institutions.
It's not capitalism, is what it is, like I said.
Today's Republicans and today's Democrats are both largely liberals, though with different ethical streaks (they just look like different policy positions). Republicans and Democrats both largely believe in liberal institutions, that they should be protected and defended to the death, and liberal institutions are for securing our human rights; in other words separation of powers, civilian control of the military, rule of law, etc., are for protecting and defending the rights to life, liberty and the pursuit of happiness.