Ask him: “Suppose I came into your office with a picture of you lighting the candles on your child’s birthday cake and said to you, ‘See, you’re okay with pagan practices.’ What would you say?”
A photo of someone lighting a candle at a non-Christian shrine says nothing about that person’s beliefs, much less the beliefs of the Catholic Church. All it demonstrates is that the individual person is lighting a candle at a non-Christian place of worship. A photo alone cannot give the context to the action, and so we do not know why a papal nuncio was lighting a candle at a Hindu shrine. Until we have that context, it is impossible to comment on the nuncio’s actions. We can only say that the photo does not demonstrate that the Church has capitulated to paganism.