To be honest, though, couldn't any dickhead reading his tweets have made the same mistake and SWATed the wrong theatre?
If you google "Pabst Theater Milwaukee" you get this:
The top result is for the group, and there are three different "Pabst Theaters" visible in the results before you even click on anything. If you're not a local, say if you're some Swatter on the internet who wanted to call in a bomb threat, it becomes clear that it could be one of several theaters. So presumably if you were targeting Pat, you'd want to make sure you got the right one. Pat said in his tweet that he was watching A Christmas Carol, not Patti Labelle. Again, if Pat is the target, you would notice something is wrong. You would have to make the same mistake twice, essentially. If I wanted to find Pat that night, with no foreknowledge of where he was, it would become immediately clear that there were multiple "Pabst Theaters" in Milwaukee, so I would see which one was playing A Christmas Carol so I got the right one. If one were to commit such a serious crime, one would at least make sure they hit the right fucking target. Whoever sent a bomb threat to the Patti Labelle concert did neither. That means one of three things happened:
1 - A third party targeted Patrick in response to his tweet, ignored that there were several "Pabst Theaters" in Milwaukee, then ignored 50% of the information in Pat's tweet, and hit the wrong venue. Torswats has been getting away with swattings, bomb threats and the like for years, you don't get away with those crimes for that long if you're not cautious and thorough, because a sloppy mistake like that could get you caught.
2 - The bomb threat had nothing to do with Patrick, the person responsible meant to hit the Patti Labelle concert and did, for whatever reason. Pat getting the name of the theater wrong in his tweet was just a coincidence. But what are the odds of the venue Pat wrongly says he is at actually getting hit with a bomb threat the one time he tweets about it?
3 - Whoever called in the threat was a Milwaukee local. I note from wikipedia that the Labelle venue is the one colloquially known as "The Pabst". Only people in Milwaukee know that, unless you look it up specifically. If someone told Torswats to hit "The Pabst Theater" and didn't give any more details, then they'd hit the main one, not the Riverside. As
@Broadside pointed out, if Pat was targeted, then whoever called in the threat also made exactly the same mistake as Pat.
Overall, I think in increasing order of likeliness, I think 1, then 2 then 3. So I think at the very least whoever called in the bomb threat did not do it in response to Pat's tweet, because if they did they would have hit the correct place. So this was either pre-planned or nothing to do with Pat. And if it was pre-planned, the only people on Earth who knew, in advance, where Pat was going to be that night were Pat and Nikki.