Someone—I don’t remember now who—described the major difference in American politics to be that the Left fetishizes being correct where the Right reserves that obsession for power.
For that reason, Republicans have been willing to abandon all previously stated principles so long as they can expect to have a warm body capable of signing regressive tax bills into law and who will nominate judges to protect conservative orthodoxies.
And it’s why a year and a half later, Democrats still get into fights about whether they supported Hillary Clinton or Bernie Sanders in the 2015-16 primary. It’s why many of us on the Left continue, inexorably, viewing contemporary events as a chance to re-litigate that contest and who was right.
So just to say, “Bernie Sanders: Guide to Political Revolution is for teenagers,” will invite cheap jokes along those lines, and merely by existing, it reinvigorates the conversation about who actually had the better fire extinguisher a year and a half ago, even as the grease fire continues to spread.