https://en.wikipedia.org/wiki/V-1_flying_bomb
So it is about the big picture. (And about small pictures like that of Elon making a salut like the other group).
So yes, currently his rockets do not transport explosives. But that can change anytime and I expect it will very soon.
1. boundary layer cooling
2. pre-heating fuel and cooling the nozzle by pushing the fuel through tubes in the nozzle
3. baffles to prevent pogo-ing
4. turbo fuel pumps
5. supersonic airframe
6. guidance system (although primitive)
The V2 was an ineffective military weapon that did little damage - because its guidance system was too primitive to be able to hit a target. Hitler also poured enormous resources into the V2 program, shifted away from producing weapons that were effective.
What use is a reusable rocket with respect to explosives?
That vehicle could deorbit and drop a tungsten penetrator, smallpox, a nuclear device or any number of things.
All funded by a combination of government spending and defrauding the public via the Tesla Ponzi scheme.