This guy should have paid attention to what he wrote just a few paragraphs above:
Huge grassroots movements, made up of millions and millions of people, are fueling the fight for a $15 minimum wage, fighting back against fossil fuels and the Dakota Access Pipeline, fighting to end fracking, fighting to remove lobbyist money from politics, fighting to end senseless wars and international violence, fighting for universal healthcare, fighting for the legalization of marijuana, fighting for free college tuition, fighting against systems of mass incarceration, and so much more.
While a couple of goals (removing lobbyist money from politics and stopping the practice of pointless wars) would have across the board support, most of those goals are exactly the reason the Democrat party is so unpopular.
I wonder if it ever occurs to any of those kids who support the Democrat party that their lifestyle becomes absolutely impossible without fuel. While they are protesting pipelines (and causing extreme damage to the environment while they are at it), does a single one of them ever stop to think that if they got their way, their precious iPhones, iPads, and other electronic toys would become useless? They claim to want "sustainability," but does a single one of them have a clue that without the high-intensity farming practices and other modern technologies which actually do sustain a high population, most of them would starve to death?
I would guess that the reason they are upset with the Democrat party is that they imagine this fantasy utopia is actually possible, and the Democrats have no compunction about promising it. However, the more intelligent elected Democrats realize just as well as any conservative how impossible that utopia is, so do not and will not deliver on their promises. (The Sheila Jackson Lee and Nancy Pelosis of the congress are actually stupid enough to believe that they can get utopia by more socialism and ludditism.)
Pelosi is firmly in the anti-Socialist Corporatism camp of the establishment. She is the one, more than anyone else who pushed in Obamacare for government control of insurance companies and government control of medical providers and government control of ordinary people rather than a Socialist single-payer system wanted by the Bernie types.