With very detailed investigations and enough fossils, paleontologists can paint a relatively accurate picture of ancient life. I say “relatively accurate” because much of their work on behavior borders on simple surmise and assumed modern analogs in the present. Did some herbivorous dinosaurs herd like bison? Probably. Did some carnivorous dinosaurs hunt in packs like wolves? Probably. After all, even though they are numerous, life strategies seem to be finite in number. There are only so many ways to get food, reproduce, and protect.
So, paleontologists rely on the world around them to interpret the world of the past. Not so with those carrying a grudge. They do just the opposite; they interpret the present on the basis of the past. Look, for examples, to those parts of the world where people are enemies because their ancestors were enemies. It’s as though such people practice a form of reverse paleontology. They keep digging up the past, finding the smallest traces of lifestyles and lives long gone to use as a model for contemporary life.
There appear to be two ways of using fossils: One uses the present to interpret the past; another uses the past to interpret the present.