The US has much larger cars so this drives fatalities up in accidents too.

Really? An accident between two large cars is generally safer than one between two small cars.

It may make collision between cars safer, but it makes collision with non-cars deadlier for the people outside the car.

The general trend for pedestrian and cycling deaths is up in the US, because increasingly popular SUVs and crossovers strike a person higher on the body, and also are more likely to push a person under the car towards the wheels or forward where they’ll be run over again, rather than over the hood.

https://www.iihs.org/news/detail/new-study-suggests-todays-s...

I don't disagree with you, and I'm not sure why you think I do?

Err in frontal collisions, maybe? But in pretty much every other case, having something with more kinetic energy will product more harm - it's physics after all. You don't see cyclists killing each others' a lot after all.

Source: https://www.iihs.org/topics/vehicle-size-and-weight