As soon as I saw this splashing across social media, I knew the real story couldn't be what was being claimed. As the story went, President Trump called up the parents of a fallen soldier and insulted both them and him, basically saying, hey, he knew the risks, that's the breaks.
And this came from a Democrat congresswoman who was on the call and heard what was said. Once she ran to the media with this story, they ran with it as if her account was unassailable. The president fired back that the whole thing was fabricated, of course, but once an anti-Trump notion is established in the public, those so inclined simply assume the version that makes Trump look worst is true and take no interest in any further information.