In Breaking Bad, some people consider it an extreme mystery that sharp minded DEA investigator Hank Schrader could not work it out that his brother-in-law was Heisenberg. It's no real mystery to me. Hank loved Walt so much that he could not possibly imagine his brother-in-law as a drug lord. Even when every single shred of evidence pointed straight to Walter.
I'm old enough to know that sort of love in a dozen different ways, to all sorts of people. Big tip - being loved by me is not particularly much fun. I'm too old, really, to think of love as that starry-eyed infatuation that teenagers tend to have.
However, the truth still remains that love makes us do stupid things.