What's the difference between a floating incendiary device and a Nazi-era buzz bomb?

NOTHING. Both are meant to maim and kill.

The IDF should be attacking, with lethal force, anyone launching or helping to launch a fire kite. Very simple. Any kite should be considered as if it was a mortar or rocket about to be launched. Vaporize the terrorists. Very simple.

Netanyahu's response via the IDF had better be biblical.

They don't care about us - so why are "pussy-footing" around them?
Send fire to Gaza .....

this is a war, and it has lasted longer than any war in israel's history.
hamas is a fanatic islamist group under the thumb of the fanatic
shia terror regime of iran.