Bikes and cars. But cars have their own space (the road) and rules (red lights, crosswalks...), whereas cyclists ride at full speed on the pedestrian's space (the sidewalk).

It’s false that cyclists routinely ride on the sidewalk in Paris, let alone at full speed. They ride on the road (car and bus lanes) and in bike lanes. It’s true, however, that on some very popular bike routes (rue de Rivoli, boulevard Saint-Michel/Sébastopol), there are enough cyclists that don’t stop at lights that pedestrians can’t easily safely cross. This is a solvable issue that’s independent from the modal share or infrastructure.

The argument that cyclists (implied: all cyclists) ride at full speed on pavement at all times is akin to arguing that cars (implied: all cars) go over the speed limit at all times. It’s daft at best, and utterly outlandish.

You should stop and have coffee in a street shared only by pedestrians and cyclists, and observe the behaviour of cyclists. I have observed it to be mostly slow, controlled, courteous and respectful of pedestrians.