If you’re a Jew, you know it the nanosecond you hear it. Anti-Semitism. The real deal.

You can’t help it. You carry the sensors for Jew-hate around with you – the alarm receptors are built into your every cell, coiled into your mitochondria, twist-tied into your DNA. Trip-wires to alert you to the Nazi-worshipper, the Grand Inquisitor, the Klansman, the Christ-avenger.

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It all comes down to what you decide to do with the information.

One characteristic of the true anti-Semite is the way in which they’ll test their message, to see how clear and public and how harmful – and in too many recent cases, how deadly – they can get before they’re stopped. The uber-anti-Semite, meantime, tests how far he can go, how high he can climb, the sewage-depth of what he can get away with, straight up against the Jews themselves.

Which brings us to the man who has now proven himself, well beyond all rivals, as the greatest anti-Semite of our age.

For years he’s boogalooed and pirouetted around the issue, dog whistling Dixie at every opportunity. This week though, he made it official, gnawing on and extracting with his very teeth the pin on the fragmentation grenade that went: “Any Jewish people that vote for a Democrat, I think it shows either a total lack of knowledge or great disloyalty.”

There it is. His test of the Jews, full frontal. Come and get me, he taunts. And just watch me as I mine and inflame and leverage the Jew in you, and turn all of it into votes.

In fact, he’s already begun. The first step was to win the mehadrin, ultra-glatt stamp of Jew-loving kosher certification from the Council of Jewish Sages known as the Republican Jewish Coalition. This took only a matter of moments.

“President Trump is right,” the RJC declared in a tweet, adding, in a wholly inadvertent effective condemnation of both itself and, in fact, the some 20 percent of Jews who still, for whatever reason, back Trump:

“… it shows a great deal of disloyalty to oneself to defend a party that protects/emboldens people that hate you for your religion.”

The RJC then dug its pilot hole a ton deeper, calling unwanted attention to the many, many Republican officeholders, Trump in the lead, who employed – without apology or censure – overtly anti-Semitic memes in their election campaigns over the past two years:

“The @GOP, when rarely confronted w/anti-Semitism of elected members, always acts swiftly and decisively to punish and remove,” the RJC tweeted.

Tell that to Republican House Minority Leader Kevin McCarthy and a host of others whose campaigns have used anti-Semitic memes, and whose political careers sail on, undeterred, unscathed.

But wait, it gets better. Now we’re seeing how Trump intends to spin his Jewish Problem into electoral gold.

The message is swiftly coming into focus. It’s not Jews he’s talking to at all. He’s talking to Evangelicals, the core reactor of his electoral strength. He’s in a do-or-die offensive to hold them and drive them and to light an inextinguishable blaze beneath their backsides, and what he’s telling them is simple as flat trajectory AK fire:

You’re better Zionists than the Jews are, and at this point, you – and especially, I – are even more pro-Israel than that Omar-Tlaib waffler Netanyahu.

Not only that, you can lock in your place in scripture, in rapture, in the End of Days, with nothing more than one vote. Donald Trump.

On Wednesday, Trump tweeted quotes from an unusually enthusiastic endorsement of his remarks about Jews. The source was Wayne Allyn Root, a conservative radio host and author, an ardent pro-Trump conspiracy theorist who described himself in a religiously Trump-thumping 2016 article as “a Jew turned Evangelical Christian.”

Decrying the carping and ignorance of American Jews, Root suggested that – following the example of Israelis who adore the American president – Trump should be seen as the “King of Israel” and “the second coming of God.”

“President Trump is the greatest President for Jews and for Israel in the history of the world, not just America, he is the best President for Israel in the history of the world. … and the Jewish People in Israel love him … like he’s the King of Israel. They love him like he’s the second coming of God …

“But American Jews don’t know him or like him. They don’t even know what they’re doing or saying anymore. It makes no sense!”

Yes it does.

I am a proud Democrat.

I am a proud Jew.

I see anti-Semitism as an enemy. I see Donald Trump the same way.

I am one of the 80 percent of American Jews who have observed Donald Trump foster, wink at, and benefit from Jew-baiting – along with Islamophobia, homophobia, misogyny, and bigotry toward African-Americans, Hispanic Americans, disabled Americans and immigrants as a whole.

I just want to say this one thing of Stephen Miller, Steven Mnuchin, the Republican Jewish Coalition, and the other court Jews who stand by, enable, protect and embolden Donald Trump’s innate anti-Semitism:

These Jews will not replace us.