They say history has a way of repeating itself.

And sadly for our nation, America is witnessing a dramatic increase in extremism from the alt-left and alt-right, as well as a swell of violent radicals spawned from a potpourri of groups fanning hatred, bigotry and divisiveness.

It’s the exact opposite of what our country needs — at any moment in history —but especially at a time when North Korea is threatening to nuke the U.S. Amid a nuclear war that could vaporize millions of lives on both sides of the pond, Americans of all stripes should be shoulder-to-shoulder in solidarity.

After all, we’re Americans first.

Yesterday President Trump condemned hate and bigotry on display in Charlottesville and called for healing and unity on several occasions. He tweeted, “We ALL must be united & condemn all that hate stands for. There is no place for this kind of violence in America. Lets come together as one!”

“We must remember this truth: No matter our color, creed, religion or political party, we are ALL AMERICANS FIRST.”

The president tried to de-escalate tensions in Virginia. saying further, “We condemn in the strongest possible terms this egregious display of bigotry, hatred and violence on many sides, on many sides. It’s been going on for a long time in our country.”

He’s correct.

Violent and destructive protests spiked under the Obama administration with a slew of Black Lives Matter riots in Ferguson and beyond. Then there were the left-wing radical protestors who violently disrupted Trump rallies during the 2016 presidential campaign — when they weren’t fire-bombing Republican campaign outposts.

And more recently we’ve seen liberal thugs violently protesting conservative speakers on college campuses, causing significant damage to public property —not to mention an egregious assault on freedom of speech.

This all must come to a screeching halt.

In a country with 330 million citizens all from different backgrounds, religions and political ideologies, we need to heed Martin Luther King Jr.’s calls for nonviolent protest. People can reject views and actions they don’t agree with but do so civilly and peacefully.

If Henry David Thoreau, Gandhi and MLK could do so — at very challenging points in history — so can we.

Adriana Cohen is host of “The Adriana Cohen Show” heard Wednesdays at noon on Boston Herald Radio. Follow her on Twitter @AdrianaCohen16.