But yet the genetics and physiological evidence says carnivore.

On the other hand, I wouldn't doubt that they were also opportunists and when the hunt didn't go well they supplemented with plants (probably nuts and possibly fruit).

One thing for sure, we weren't vegans, no matter what the veggie propagandists say.

Another though is that the nuts and fruit tend to ripen right before the starvation season (winter in the temperate zones and the dry season in the tropics). So when the fruit and nuts were plentiful they may have eaten them, put on a coat of fat, and it may have enabled them to have reserves for the lean times.

When bears come out of hibernation they are carnivores, but right before hibernation the fruit and berries ripen and they put on a lot of fat. It's not a stretch to think humans ate the fruit right before the lean season, but with no canning, freezing or other forms of storage, they certainly didn't eat fruit all year long.

But I'm not an expert in the field, just thinking out loud.

Bob