People make it sounds like the problem is the naivety of the idea "UV & disinfectant, which kill the virus on surfaces, could treat it in people". IMO the bigger problem is the sheer incoherence of his disjointed rambling. He can't produce a single lucid sentence or idea. 
It's easy to contest that he suggested using disinfectant as treatment (or inversely, to suggest "he wants to inject bleach in people haha"), because literally none of what he says makes any sense on its own. It's word salad. You can interpret it any way you like.
In a time of crisis, I too like my president to be an underfit language model
