Nano: "Is a person showing love when they do not tell a brother or sister that what they are doing is life threatening?"
When you see a life threatening situation, you do not ask, "Is this person part of the Bride of Christ". Instead you say that you have a duty to act, regardles of their faith or lack of it. It is enough that a brother or sister is in danger.
Yet when deciding what language or treatment is appropriate to that person in that endangered state, you apply a different test: those that are part of the Bride of Christ are entitled to the charitable treatmetn due a brother, those not part of the Bride of Chist are not due like treatment. They may be treated as dogs: it is enough that they have been informed of their perilous sinful state.
In one case, it is enough that a brother is endangered to elict your charity (agape), in the other, you feel entitled to qualify that charity (agape) depending on his status within the Bride of Christ. Doed this not strike you as contradictory?
Nowhere do you offer proof that Romans 14:10 or any of the other citations is limited to Christians. Who are you to set a limit to the love of God?