And the thing is, the algorithm seems to send these sorts of far-left and far-right conspiracy video links to just about everyone. Sometimes I hesitate to click on a video on Youtube that I disagree with just because it might attract more in my suggestions, but it doesn't seem to make much of a difference.
Because of the number of people who do click on them, who do follow them. The more popular something is in general, the more the Facebook and Youtube algorithms will shop them around, hoping to generate even more clicks, and retain more attention from a population with a shrinking attention span.
I get all sorts of random crap showing up in my Youtube feed, and it's always crap with a whole lot of views. Most of it is, fortunately, pop-culture pablum; mainly because I steadfastly avoid politics on Youtube, and mostly avoid "re-sharing" content on Facebook (I'm not on Twitter, but if I was, I would definitely not re-twit anything political there).
Hate gets views. That is something that most long-time Youtubers, especially content-creators, are aware of. People
love to join mobs. Even (especially?) lynch mobs. The mob provides a sense of belonging, of camaraderie, and of a united front against the Wrong, the Other. Controversy in general draws attention, but hate in particular, because it's such an intense emotion. It generates outrage, both on those who agree, and those who disagree; and the latter are just as important for maintaining its popularity, because they are still driving viewership. Doesn't matter what the hate is about -- pop culture, sports, politics, religion, immigration, pizza toppings -- as long as it is something that people feel a strong emotional reaction to. A reaction which can be manipulated to gain views.
And the far-right understands this all too well. They know how the system works and know how to effectively manipulate it, what buttons to push to get views. And in the process, how to get the fence-sitters and politically less astute to, if not join their side, then at least act as "useful idiots" in their defense. That's why they are pushing the "freedom of speech" and "freedom of religion" angles so incredibly hard right now, despite being demonstrably opposed to both.