Earlier this year, I created the tags chemical-weapons and incendiary-weapons. Later, a moderator absorbed the latter into the former. However, napalm and thermite are not chemical weapons according to the common usage of the term.
I might have been the one combining these. The reason was probably that neither of the tags will have many questions, so I thought combining them would be a good choice; my naive perception was that the two are not so different. I would have called (wrongly) napalm a chemical weapon any time (today I learned...).
In any case, I support a renaming, while keeping the two in one tag (there are little over 10 questions now). Maybe 'weapons' would already be enough, it's a chemistry site after all.