The site has a broader conservative coalition than the largely young, mostly male crews camped out on Reddit’s Trump forums or slithering around the anonymous message board 4chan. The Facebook factions have found a home here, too. Recently a woman named Lisa posted to Gab: “Hi folks. I’m a #gabmom from Ohio and this is my 1st post. Still trying to figure the format out but thanks for the site Andrew!” Her note has been up-voted more than 200 times. Gab’s mascot is a frog, which Mr. Torba claims is based on religious and natural sources associating frogs with exodus and rebirth. Many users see it as a wink to Pepe the Frog, the internet cartoon that became a 4chan icon and — after being dressed up online in Nazi insignia — was declared a hate symbol by the Anti-Defamation League. But plenty of non-meme-fluent Gab users just see it as a cute mascot, “Gabby.”

High on Mr. Trump’s win, Gab users are pretty upbeat. Part of the reason that Gab’s anti-anti-harassment rules work so well, so far, is that most people agree with one another. And one of those points of agreement is that anti-Semitism is tolerable, if not exactly preferred. On Twitter, anti-Semitic and racist trolls prowl around, pouncing on users while dodging the site’s moderators. But on Gab, anti-Jewish rhetoric is slung casually and liberally. One user, angry that his content had just been downvoted, wrote, “Thanks to the #Jew that just stopped by.” Andrew Auernheimer, a white supremacist troll known as weev, kicked off a minor censorship debate when Gab erased his bio, which advocated the rape, torture and murder of Jews. When one user advised weev to be more careful to avoid trouble with the law, another accused him of being Jewish.

While mainstream social networks are promising to crack down on “fake news,” Gab clears the runway for posts like “Satanic PizzaGate Is Going Viral Worldwide (Elites Are Terrified)” to pick up speed. Ricky Vaughn, a pseudonymous white nationalist (he takes his name from Charlie Sheen’s character in “Major League”) also barred from Twitter, posted to Gab that Twitter is effectively dead and should now be used only to pull off “skirmishes” against Twitter denizens. Gab would be a convenient base for recruiting more digital foot soldiers to that cause.

Behind the rah-rah free speech attitude, dissenting opinions on Gab are quashed in their own way. Overtly racist accounts were created by enemies to make Gab look bad, Mr. Torba said in a post. “Without a doubt,” he wrote, “we have fake shill profiles attempting to play into the media narrative.”

But some have worried that the site’s insulation can dampen their message. “Now that Twitter is purging everyone, I think it’s important for Gab to branch out and attract leftists so we’re not just preaching to the choir,” wrote Paul Joseph Watson, editor at large at Infowars.

When I asked why the site leans conservative, Mr. Sanduja denied that Gab had any ideological bent. “We challenge this premise completely — to the contrary, Gab has a number of diverse users globally,” he wrote. (There is a politely argumentative Democrat who goes by the handle @Democrat, for instance.) But he added that right-wing users would be naturally drawn to Gab. “When a group of people are being systematically dehumanized and labeled as the alphabet soup of phobias,” he wrote, “they will look for a place that will allow them to speak freely without censorship and devoid of Social Justice bullying.”

But that’s the trick, isn’t it? You can’t sell a social destination where conservatives are free from liberal pestering and expect the pitch to resonate across the spectrum. Even the idea that harassment rules are oppressive — instead of protective of the vulnerable — is itself a pointed worldview. I suspect that any concern about inclusion will be assuaged by the comfort of chatting with people who think and talk the same way. It’s the next logical step after all the blocking and muting on Twitter and filtering and unfollowing on Facebook split America into two social media realities. Where there once was a bubble, now there’s a wall.