Calling out the cigarettes but ignoring the next line about kerosene.

If you did them the other way, kerosene then cigs, well that would burn the parasite out, sure, but the host… well, it might hurt a little.

You can drop a lit cigarette in kerosene and it will just put the cigarette out. You can also so that with diesel. You cannot, however, do that with gasoline.

A cigarette won’t usually light gasoline, if you’re quick and it’s cold enough you can plunge a lit match into gas. Diesel is practically difficult to ignite, I mix it with gasoline for a good, safer firestarter with a longer burn