Make knives that can only be used to kill people and solicit/provide the knives to bad actors who you know will use the knives for the purpose they were developed for?

make an AI-powered knife that wants to stab as many people as possible, then market and sell it to despotic regimes.

I mean, I kind of reject where this line of questioning is going; I consider most of Palantir's product line to be inherently unethical, so I reject the notion that they can be considered a simple tool manufacturer, like a knife manufacturer could be.

The manufacturer giving the knives out to government agencies explicitly so that they can stab civilians more efficiently