It was a 'dig' on the background of the shooter, including social media posts. Not very useful to not save links to all this stuff, I know. Even if I did, the originals are probably deleted and it could be called a fake.

But essentially, the shooter was a burn loot murder supporter, and had posted about wanting to "take out some of those people". It seemed to reference White Trump supporters.

The link I saw was probably on https://poal.co/all/hot in the first half of January.