The quote was authored by liberals, so of course its going to be insulting towards their major rivals.

Of course, leftists have their own sayings. One of my favorites being

“When I give food to the poor, they call me a saint. When I ask why the poor have no food, they call me a Communist.”

Although

The maoist uprising against the landlords was the largest and most comprehensive proletarian revolution in history, and led to almost totally-equal redistribution of land among the peasantry

is a close second.