The V-2 could only be justified using nuclear weapons...period. This weapon carrying a conventional warhead is equivalent to sending a Me 110 armed with 1000 kg of bombs to crash Kamikaze style into a random target over a several square mile area. It is clearly completely ineffective as a weapons system and horribly inefficent economically.
The V-1 is almost as bad. Diverting the materials into more artillery and communications equipment for the army would have been a better choice.
But, when one is desperate for a solution to win the unwinnable impossibly stupid things often become the straws grasp at first.

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Truth is stranger than bullshit!