There is a school of belief within Christiandom that holds the view that Jesus dispensed with ALL the commandments of the old testament (OT) and replaced it with one single principal law, namely, the injunction to love your neighbour as yourself. Let us, arguendo, concent with this view, if only to put this principle through its paces.
Supposing you live in a country where there is habitual civil unrest, say Nigeria. And that you are a Christian living in a region in Nigeria of mixed Christian and Muslim population. And that you have good relations with your muslim neighbours and are friendly with them. During one of these episode of civil unrest, a "christian" mob are look for muslims to lynch and kill. Your muslim neighbours are hiding in a place known only to you.
The "Christian" mob approach you asking for the whereabouts of your neighbours. What would you do?
1) Because you love you neighbours, are you going to tell a lie to the mob, thus saving their lives?
2) Tell the truth and reveal their hiding place, thus guaranteeing the certain death of you neighbours?