Hordes of angry youths have taken to the streets across the country to protest the fact that Donald Trump was just elected America’s 45th president. Few seem to realize that the protests confirm for reluctant Trump voters that they made the right choice.

The failure to demonstrate peacefully certainly does the kids’ cause no good.

Tens of thousands marched in 25 cities Wednesday night and again on Thursday. Beyond the “Not My President” signs and the obscene anti-Trump chants, violence broke out repeatedly.

In Oakland, Calif., marchers threw Molotov cocktails and rocks at police, set dozens of trash fires and vandalized businesses. In Manhattan, some three dozen were arrested.

A few idiots on social media are even calling for Trump’s assassination.

Behaving, in other words, precisely as they smugly predicted Trump’s supporters would react after — as they all expected — he was trounced by Hillary Clinton.

Just a week ago, recall, many of the same pundits and political leaders who totally misread the national mood warned Trump fans to suck it up and accept the reality of Clinton’s victory.

Yet now we’re told this willful rage is an expression of free speech and democracy.

Sorry — what happened on Tuesday was democracy in action. Stubbornly refusing to accept the result and demanding Trump’s “impeachment” even before he takes office is a flight from reality.

As is the silliness on college campuses — the exams called off so students can “heal,” the “cry-ins” for hyper-sensitive snowflakes challenged by a lost election.

Suck it up, kids. Life is full of disappointments that you need to learn to accept. Hillary Clinton has, and so should you.

Fact is, the only way of stopping Trump from becoming president was at the polls. Save the marches for after his inauguration — when he actually does something.