The problem is that liberalism is being conflated with progressivism/socialism. Although I am conservative I acknowledge that liberal viewpoints are healthy to our democracy; not every problem can be solved looking through one lens.
I believe that today's liberals are nothing like those of the past, like President Harry Truman who was very anti-communist, or President John F. Kennedy who would, in today's Democratic Party, would be considered conservative.
The liberal of today, I believe, easily moves from liberalism, to socialism, to communism. You only have to look to many colleges to see this move from simple liberal thought to advocating complete communist overthrow of the Constitution.
There is nothing wrong with a well thought out liberal viewpoint, but there are very, very few really thoughtful liberals left. Today's Democratic Party does not want them.
Those who expect to reap the blessings of freedom must, like men, undergo the fatigue of supporting it.
______Thomas Paine, The American Crisis, No. 4, September 12, 1777