Since then, Mr. Mastriano, a far-right state senator who has falsely argued that the 2020 presidential election was stolen and who rarely speaks to traditional news outlets, has ignored criticism of his association with Gab.

But the platform’s founder and chief executive, Andrew Torba, has hit back — most recently, using an anti-Jewish trope.

“We’re not bending the knee to the 2 percent anymore,” Mr. Torba said in a video this week, an apparent reference to the rough percentage of the country that is Jewish…

The Jerusalem Post on Tuesday quoted Mr. Torba as saying in one video that neither he nor Mr. Mastriano would give interviews to non-Christian journalists.

“My policy is not to conduct interviews with reporters who aren’t Christian or with outlets who aren’t Christian, and Doug has a very similar media strategy where he does not do interviews with these people,” Mr. Torba reportedly said. “He does not talk to these people. He does not give press access to these people. These people are dishonest. They’re liars. They’re a den of vipers and they want to destroy you.”