@High Strangeness,
If you accept the statements as true, Jesus made them without qualification. He didn't say love your neighbor as yourselves, but only if they aren't pillocks. In fact, it seems explicitly the opposite because then he goes on to say what does it credit you to love only those who love you? Even the heathens do this.
The contradictions are contradictions because of things like this. On the one hand there's thou shalt not kill. Then there's mass killing. What does this say?
God: Don't kill unless I command it or its for a good cause! And if you get into a sticky situation, just say I commanded it because its honorable and the other guys are bastards. Wait, but then I said love your enemies. Myself Damnit! OK, love your enemies unless they have resources you need to pilfer or unless it suits you in general. Is it too late to make an edit? What? Oh, yeah, interpretation and all that.
What good are these 'exhortations' or commandments if you can break them based on the situation? You can always find an excuse..