I'm afraid I will have trouble fitting the answer in the limited time frame, because this is a very complicated subject.
I cannot tell you what the level of coordination is between Alex Jones and the very big disinformation players, by which I mean mainly Moscow; however, it seems very much like exactly the kind of work that Russia loves to do everywhere in the world. Whenever there was a terrorist attack in Europe, be it Brussels, Paris or London, every time you would see the pro-Russian channels spreading exactly the same: It was staged. It was staged for the purpose of imposing greater control on the population.
What Alex Jones was doing here was basically Russia's work. I don't know whether he was doing it because he was paid for it. I don't know whether he was doing it because he's just a useful idiot abused by Russian disinformers, but he was essentially doing that.
The way these campaigns achieve such a magnificent result is mainly through the sheer numbers. It's not just social media; it's also the traditional media. The Russian state-controlled ecosystem, the proxy ecosystem like Infowars, Breitbart, ZeroHedge and similar outlets are always saying that they are the only independent alternative to the mainstream, but they usually parrot Russian disinformation.
Also, there are local actors who are helping them to amplify this, be they paid agents or not. There's a lot of evidence that Russia pays hundreds of millions annually to cultivate these people to spread their disinformation campaigns: politicians, social media influencers, etc. It might also just be ideological allies; it might be just useful idiots. In certain cases, it might just be cynical individuals who know that they are lying, but it helps them for their political purposes or other goals.