Why's everyone picking (rightfully) on the sheriff alone and ignoring that he got a legal warrant from a judge, and that the defendant was then later kept in prison by a judge?

That'll be because of this bit:

> Weems admitted in a later interview that he knew at the time of the arrest that Larry’s Facebook post was a pre-existing meme that referred to an actual shooting that took place in a different state, over 500 miles away. But Weems and Morrow left out that extremely important context from their warrant application.