Himmel Soan saw them as a bunch of clowns and couldn't be bothered to argue with them. He had tried to help Neige. However, not only they wouldn't show any gratitude, but they were also turning against him.
As a result, Himmel decided to let them be.
He didn't have the energy to care about Neige anymore, and those people could say whatever they wanted.
"I agree! I felt from the beginning that the Moonian video was too fake!"
"Totally! The camera has to be so close to the meteorite to record that kind of image. What's the meteorite's speed? It's 1/360 of the speed of the light, which means the camera has to move at the same speed! How is this achieved?"
"There's only one possibility: Moon has made that video in advance and is showing us a recording! They didn't expect us to see through it! I almost bought it!"