The real lesson I got from the article is that politicians are the worst face of a pandemic response: it risks that half of the populace will do the opposite of the advice given.
Once the issue is politicized, that snowballs -- propaganda has infected modern discourse to a disturbing degree, and it's hard to see well-organized denialism being amplified by far-right media as anything but a cold-hearted hoax.
That simply begs the question. Whether you label it "hoax" or "misinformation" doesn't matter. What matters is whether or not something someone says corresponds to actual truth. The beauty of science is that you don't have to take anyone's word for anything, you can actually go and do the experiment for yourself. So by all means, if you think Donald Trump is on to something and the press and the scientists are all conspiring against him to make him look bad for political reasons, then do the experiment: go inject yourself with bleach. I won't stand in your way. But I will give you long odds that it won't end well for you.
A minor but salient point: in common usage, a hoaxer would be a person perpetrating a hoax, not a person who believes (incorrectly) that someone else is perpetrating a hoax. The people who you are referring to hear are better labelled "denialists" than "hoaxers".