User blog comment:The Crimson Eagle/Crimson Poll™ XXX/@comment-4685497-20121204163656/@comment-5579230-20121206223212

Well, we CAN view a ancestor death but only through the memories of another ancestor.

Flavia, for example, is a ancestor of Desmond like her father and she was present at Ezio death.

SPOILER

Another example is Haytham death at the hands of Connor, both were Desmond ancestors but we saw Haytham dying by the memories of his son not himself.