Israeli Prime Minister Benjamin Netanyahu waves after speaking before a joint meeting of Congress. (J. Scott Applewhite/AP)

Rep. Steve King (R-Iowa) challenged Rep. Steve Israel (D-N.Y.) to say it to his face in a tweet Saturday.

Yes, King used Twitter to admonish Israel for using Twitter to call him out.

It all started Friday when King said on Boston Herald Radio that he didn’t understand why some American Jews put being a Democrat before being Jewish.

“Here is what I don’t understand, I don’t understand how Jews in America can be Democrats first and Jewish second and support Israel along the line of just following their president,” he said. That analysis came during a conversation about the more than 50 congressional Democrats who skipped Benjamin Netanyahu’s Capitol Hill speech in early March.

Rep. Steve Israel (D-N.Y.) attended Netanyahu’s speech, and even escorted the prime minister into the House chamber, but he called the event a political stunt by Republicans to drive a wedge between Democrats and Israel.

“I have proudly been to Israel more times than Boehner has been to a golf course — and certainly more than many Republican members of Congress who now sanctimoniously defend the invitation,” Israel wrote in the New York Daily News, referring to House Speaker John A. Boehner (R-Ohio), who invited Netanyahu to address Congress and has since announced plans for an upcoming trip to Israel.

Israel responded to King’s comments in a tweet: “I don’t need Congressman Steve King questioning my religion or my politics. I demand an apology from him & repudiation from GOP. #dangerous.”

Then Saturday King responded, on Twitter, by calling out Israel for not saying this to his face. (Yes, pot meet kettle, etc.)

Not to be outdone, Israel flexed some Jewish muscle, again on Twitter, chiding King as a “Talmudic scholar” and calling him “mashugana,” adding, “Look it up.”

(Mashugana is Yiddish for crazy. That pretty much sums up a Twitter war over Israel between a guy named King and a guy actually named Israel.)