Newly released FBI documents reveal a possible motive for Las Vegas mass shooting

This FBI report is a big steaming pile of horse hockey. Why? Lets do a quick breakdown.
1. Causation: shooters "animosity towards casinos". He loved casinos. What he didn't love was management. Irrespective, why shoot people at a concert because you don't like the way the casino is managed where you are staying?
2. Heavily redacted documents. This is a criminal investigation not an intelligence operation. Once you redact "information gathering techniques", that should leave the pages still mostly "in the white". The vast majority of information was gathered during the conduct of field and office interviews. There is little new in this area unless coercion is being used.
3. "Another witness said that the murderer believed Hitler was a good man". How would a witness or victim know the murder well enough to say this? This is called "Lets find a way to include the few right-wing lunatics into this story".
4. Warns against harmful speculation. In other words "don't think about this, just believe what we tell you". If speculation is harmful (how?) than why put any information out in the first place? Especially on an old case that regrettably few people are still thinking about?

But there is something happening that the Executive Branch would like to distract you from thinking about. Hummm