I suppose it depends what you mean by handful, but when folks in my rural Northern Canadian area are quoting YouTube, Fox News, or Facebook conspiracies.... the reach is broad.
Jade Helm was going to lead to martial law imposed in Texas. During that period a poll showed 32% of republicans felt the government was trying to take over Texas.
In the US alone, I’d hazard a guess at least 50 million people thought Obama was a Kenyan Muslim socialist. Before you say “that’s crazy!” Remember that’s only 15% of the populace. 6% believed the moon landings were faked according to a Gallup poll in 1999.
The last election with that immigrant caravan is another example of exploiting people’s tendency to believe things uncritically.
In short, people believe what they want to believe, and it gets worse when propaganda is rampant.