'Blowback' is handled by the Marketing department. 'Death threat' is handled by the Police department.
Technically, I can claim that every comment on Hacker News is a blog post, since it has a permalink and shows (threaded!) replies beneath it — supported by both posts and comments being the same /item?id= — but to make such a claim would be inappropriate in the site's context, both because certain 'items' get special treatment as 'posts' (e.g. cannot be downvoted), and because their underlying equivalence is invalid in the site's context. In the context of political pressure, 'blowback' describes press and public opinion drama; 'death threat' describes a criminal act. That some blowback contains death threats does not permit them to be lumped under the non-criminal heading of 'blowback'.