In the Twitter video (https://twitter.com/FrankFigliuzzi1/status/13244858190427054...), Bannon immediately goes on to talk about executing traitors and justifying it with historical examples. So, he's not just talking about "putting heads on pikes" metaphorically, but also doubling down on why execution is a viable tool historically. And Bannon knows that these comments come with the context of Fauci needing 24/7 security after receiving multiple death threats.

You might come down on either side of the censorship / free speech argument, but Bannon knows exactly what he's doing with his words here, and it went beyond a one-off bad-taste metaphor.