It's not a claim, it's an arguably stupid question to some guy off-screen. Yet, the title of this video is "President Trump claims injecting people with disinfectant could treat coronavirus". The outlet is the presumably reputable "Telegraph".
Trump also never called Nazis "fine people". What actually was said:
The job of the media is to fabricate outrage and scandals, because that's how you get attention. Trump doesn't even mind, in fact he is taking advantage of it:
Remember when he "accidentally" mistook WWI for WWII in some press conference? The headline: "Another dumb thing that Trump said!"
However, it's a mistake that anybody - particularly average Joe - could've made. It's not really that negative, in fact it could be endearing to some people.
More importantly though, that headline is going to take attention away from actually negative news, such as "over a thousand American Coronavirus deaths occuring every day".
So, if you think Trump is really that stupid, maybe you're not really that smart.
No he didn't, you fell victim to the fake news media.
During one of the press conferences, he asked some scientist or doctor guy if disinfectants can kill viruses on surface, would it be possible to create an injection that works like a disinfectant cleaning the body. He never said people should do that on their own.