Yea, i actually like this as well. Its taking the Isekai power scaling to the extreme like a proper parody should. Most Isekai seem to have the protagonist kill people so long as its for their gain, but then take the moral high road when it suits their narrative. This guy seems to strictly adhere to his rule of self-defense, because to him it really is as easy as saying "Die" and if he started killing for every micro-aggression there really wouldn't be anybody who could stop him. It's a bit smarter than it lets on, and while though it's not some masterpiece of introspection into the genre it's entertaining to read at the least