"Both sides" are not responsible for the horrific political terrorism we saw last month. Only the right is to blame -- starting with President Trump and his complicit enablers in the Republican Party.

They have been playing with fire. It was inevitable that people would get burned.

Am I not supposed to blame Trump? Well, he blames me. After at least 14 mail bombs were sent to prominent Trump critics and 11 innocent worshipers were slaughtered in a Pittsburgh synagogue, this is what the Pyromaniac-in-Chief had to say on Twitter: "There is great anger in our Country caused in part by inaccurate, and even fraudulent, reporting of the news. The Fake News Media, the true Enemy of the People, must stop the open & obvious hostility & report the news accurately & fairly. That will do much to put out the flame of Anger and Outrage and we will then be able to bring all sides together in Peace and Harmony. Fake News Must End!"

Divert, deflect, attack. Drive the wedge deeper.

This is what Trump does -- it's the only thing he knows how to do -- and the damage he is inflicting will not easily be repaired.

On Oct. 27 Pittsburgh's vibrant Squirrel Hill neighborhood became the site of the worst attack against Jews in U.S. history. A gunman toting a military-style assault rifle and three handguns barged into the Tree of Life synagogue and began firing, killing eight men and three women because they were Jews.

An attack of this kind somewhere in the world perhaps should not have been a surprise. Leaders of Jewish organizations have reported a sharp rise in anti-Semitic incidents, including hate crimes, not just in the United States but in Europe and elsewhere as well.

But the alleged assailant, a 46-year-old loner named Robert Bowers, appears to have had a specific delusionary complaint.

From his social media postings, he seems to have bought into an insane white-supremacist conspiracy theory about Jews seeking to diminish the power and influence of American whites by promoting a flood of nonwhite immigrants. An organization called HIAS -- founded in 1881 as the Hebrew Immigrant Aid Society to assist Jews fleeing European pogroms -- was supposedly somehow involved.

How does this have anything to do with Trump?

Bowers apparently didn't even like the president, believing him to be far too soft on immigration. But Bowers was fixated on the so-called "caravan" of Central American migrants, which Trump and the Republicans cynically exploited to drive turnout in the midterm election. GOP candidates portrayed the slow-moving column of asylum-seekers as an imminent "invasion." Trump actually used that word in a tweet.

There is in fact no emergency, no invasion, no reason to panic. Trump and the Republicans helped convince Bowers otherwise.

The Pittsburgh massacre came one day after Cesar Sayoc, 56, was arrested for allegedly sending more than a dozen crude pipe bombs to high-profile critics of Trump including former president Barack Obama, former secretary of state Hillary Clinton, former attorney general Eric Holder, actor Robert De Niro and others.

Among the targets chosen by alleged bombmaker Sayoc was billionaire George Soros -- who also features prominently in alleged shooter Bowers's insane fantasyland as a purported financier of the nonwhite invasion.

Unlike Bowers, Sayoc is a fanatical supporter of Trump. The sides and windows of his van are plastered with pro-Trump stickers, including a picture of Clinton with the crosshairs of a gun scope on her face. On social media, Sayoc posted images of himself wearing a Make America Great Again cap at a Trump rally.

Sayoc was arrested two days after a gun-wielding man named Gregory Bush, 51, tried to force his way into an African-American church near Louisville, Ky. When he could not get in, he went to a nearby grocery store, where he allegedly shot and killed two black customers at random. According to news reports, he told an armed white bystander who confronted him: "Please don't shoot and I won't shoot you. Whites don't kill whites."

From the first day of his presidential campaign, Trump has deliberately whipped up anti-immigrant fervor and stoked racial animus. By obliterating the normal boundaries of political speech, he has opened new space for unapologetic advocates of white supremacy, anti-Semitism, misogyny and other biases to spew their venom.

And the GOP happily goes along.

Don't tell me that "both sides" need to do better. Republicans who remained silent deserved to be swept out of office.

Eugene Robinson (eugenerobinson@washpost.com) is a columnist for The Washington Post.