You break into a house, you have nefarious intentions. You made a choice to cause physical harm

You tie a man up, and beat him to death...then, you also have "nefarious intentions". If you didn't intend to do any harm, then you wouldn't.

You stop being a victim when you choose to keep going, after the point where it stops being necessary. If that's simply because you lack any kind of self-control...then it's manslaughter. But if you knew what you were doing, and did it anyway...then it's murder.

It's not fucking hard, dude. It doesn't matter how much you think they "deserve" to die. Murder is still murder.