This is exactly what children do when they don't get their way: throw a tantrum.
(The Right didn't throw this kind of tantrum when Obama got elected. Two years into his Presidency, after he showed his true colors, the Tea Party emerged. They held some quiet, orderly rallies, and that was pretty much it.)
The Left uses any excuse to riot. They are currently doing it in Hamburg, at the G-20 summit. They set cars on fire, smash store windows, throw Molotov cocktails, throw things at policemen, and in general just wreak as much havoc as they can.
This is the behavior of juvenile delinquents. (Though JD's aren't vain enough to attribute their destructive impulses to a higher purpose.)
The Left prevents conservatives from speaking on campus.
Children scream over you so you can't be heard, or cover their ears and screech, "I can't hear you!"
Since many on the Left seem incapable of logical argument, they resort to name-calling instead. ("Racist!" "Sexist!" "Homophobe!")
That's exactly how children argue, by name-calling.
Various members of the Left will sporadically threaten to leave the country if the Republican is elected President.
This is what spoiled children do: say they're going to hold their breath until they turn blue if they don't get their way.
The Left expects the government to provide them a decent living in return for doing nothing.
Sorta like a child getting an allowance.
The Left does an awful lot of virtue-signaling. They recite the correct beliefs, so as to communicate how good they are. (And they always seem to beam with pride as they do so.)
This is exactly how a teacher's pet acts.
The Left, more than anything else, conforms. They are terrified at the thought that they might say something politically incorrect and someone might accuse them of being racist or sexist or homophobic.
Children are said to be particularly vulnerable to peer pressure.
Various members of the Show Biz Left have talked about bombing the White House, or shooting Trump, or have symbolically decapitated him. They don't actually mean it; Trump was in no danger from any of these Hollywood loudmouths. But they did love to playact.
This is what children do: play make believe games, like GI Joe, or cops and robbers.
The Left has tried to portray Donald Trump as the second coming of Adolf Hitler.
Children create bogeymen whom they can be afraid of.
The more you think about it, the clearer it becomes that many on the Left simply got stuck in infantile mode.
They need to grow up.