My hypothesis is that the U.S. didn't become more divided because of moron sites like I.W. but rather because of our collective reaction to them. These groups are far easier to ignore when we stop trying to silence them.
Divisiveness in the US goes much deeper than that, and long predates both the Internet and that kind of radio program. You could perhaps pick the early 70s as a starting point, with the US deeply divided by Vietnam and Civil Rights, at exactly the same time as real government conspiracies (Watergate, COINTELPRO, MKUltra) came to light.
I'd actually trace it back further than that, through McCarthyism, the Civil War, and back before the Revolution. But there's a fairly direct course between the divisiveness of the 1960s and where we end up today.
I really don't think it would have helped anything to ignore Alex Jones.
Even when a system nominally has more than two parties, there are usually two dominant parties. Other parties either align with one or the other, or are sidelined. People associated with losing parties never seem to be pleased just that their voices were heard.
But it's still not all-or-nothing. For example, the Liberal party often adopts NDP positions if they're gaining popular support. And when the big parties get complacent, they risk losing their "one of two" status. In 2011 in Canada, the NDP was the Official Opposition (second winning party) and the Liberals were a distant third, leading to a big shakeup in strategy. And the provincial parties are different than the Federal parties. I think our system is flawed and too "two party", but the small plurality of parties is what makes Canada a lot less prone to political extremism in my opinion.
Canaidan-Australian Youtuber Paige Saunders has a video arguing that instant runoff voting tempered more extreme politicians in Alaska:
But watch out: America tends to be on the forefront of things. Political extremism persists because it's politically successful. Extremists are enthusiastic, and moderates often follow them because it gets them what they want.
I hope Canadian's cultural adversion to the kind of behavior Americans display will save you for a long time to come. But the fact is that extremism works, and many people will prefer to win against their principles than lose with them.
In my opinion, American Exceptionalism is not a pretension that the USA is the best, but a general assumption that culture primarily drives a nation's systems and not the other way around.
Or because after Iraq war and Covid the default is to be skeptical of everything government.
[1] https://www.jezebel.com/dont-ignore-the-trolls-feed-them-unt...