Sins of the father are not sins of the (grand)son.

Of course, but this lineage should indeed encourage some scrutiny.

You'd be surprised how often the beliefs of the father/grandfather are those of the son/grandson, not to mention how often they feel the need to avenge for the perceived injustices or slights done to their parents

Given the history of his family, one would expect them to avoid risqué associations and activities. I think it deserves some scrutiny.

Of course not, the grandson is hard at work on his own sins.