They would rationalise anything they did by convincing themselves that it was the correct communist thing to do; but really their only interest was the party and their own position within that party.
There’s a similarity going on in economics, led by the Patron Saint of Leftist Economics, Paul Krugman. (Not to digress, but any cursory read of Krugman’s academic papers shows that he advocated free markets as much as any other economist. It’s only since he’s been reborn as a New York Times pundit did he start to force his economics into a socialist context.)
At any rate, Keynes believed that government should spend into recessions. So, politicians who love big government control look forward to recessions, because they can use that belief of Keynes’ to justify growing the size of the government. This is why Rahm Emanuel called the events of 2008 an “opportunity”, the result being that the size of government under Obama ended up being substantially larger than it was under Bush.
So, because of THAT, leftists and liberals view Keynes as a “liberal economist.” Of course, they are ignorant of Keynes to say that. Keynes was a rabid free marketer; and what is never discussed is Keynes own CONDITIONS for spending into a recession, e.g., that the government balance its budgets during times of plenty.
Long story short, advocating spending into recessions is not Keynesian, UNLESS you also balance during the times of recovery. To spend into a recession with no intent of balancing is not Keynesianism, it is leftism using Keynes as an excuse.