I think you are a supporter of freedom of speech in general - that's something I thoroughly approve of too.
I also think you are able to understand the difference between seeing a horrendous crime and seeing that crime and attempting to profit from it.
That seems to be what this bloke did: He tried to change and engorge the narrative regarding these horrific murders. This wasn't simply the usual run of the mill "American conspiracy theory".
He tried to convince the world that the crime didn't actually happen and even worse tried to convince the world that the dead were actors and other nonsense. He was caught out rather neatly when his defence team sent rather too much SMS data to the prosecution.
I am a fervent supporter of freedom of speech and other fundamental rights but there have to be boundaries - of reasonable decency and other quite tricky to pin down terms.