There's a few theories. But I'd imagine this is how it could go down (my opinion):

Malik Obama tweets a few salacious photos of Barack Obama on twitter where he is holding an AK-47 and shooting it either at a US flag or someone who is a US citizen. It starts to spread on every other social media platform. The social media companies realize what's going on and their algorithms are in overdrive. The algos are having a difficult time censoring the photo - it's not that they are doing a bad job, it's that the algorithms are doing too much of a good job where they begin banning people. At this point, many normies see this mass censorship but it also fuels their curiosity.

As if they were caught red handed, the social media companies decide to pull the plug on their social media platforms, effectively shutting down access to their 'customers'. Meanwhile, Truth Social operates outside of the swamp and these photos find their way over on Truth Social. They begin spreading as well but at substantially higher rate. People who have now been blocked-out of their social media account (facebook, twitter, etc) find their way over to Truth Social & join out of pure curiosity. At this point, the DS realize this is a ticking time bomb and effectively cuts all internet in order to prevent the spread of the photo on a platform that they cannot control.

My theory anyway.