What god thinks of christian missionaries.....

[Angrboda]

What does it mean to understand the NT in light of the OT?  That just sounds like an empty phrase.

The old testament is the whole story of why the sacrifice of Jesus in the new testament was necessary  It all points to Jesus, the messiah.  Without the old testament there would be no meaning to the new testament.

I'd say you've got it reversed. That's interpreting the old testament in light of the new testament. But I can understand how you make that mistake.