No, obviously that's not what they're saying. There must be some reasonable interpretation then, right? Let's look at the chat thread and see what we can find.
> be very cautious about evil uses of seemingly safe technology when developing initial capabilities
>> that's super hard since most things can be repurposed
>>> (your other comment) it's actually easy though, just look at how we could repurpose these death machines
>>>> (their comment) but...that's wildly inefficient
The subtext to their answer is going an entire opposite direction to your rant. People are saying that turning anything into a killing machine is easy, and their comment is saying that doing so is sometimes Pareto-suboptimal, and so wildly so that no semi-rational-at-least-a-little-bit-sometimes military is going to bother trying to weaponize your silicone basting brush or what have you.
They're not saying that you should mass-murder people, as you, yourself speculated.