I think a common misconception is that the concern is about the ionization potential of the radiation. The way I've heard it explained is that microwave frequencies (including, but not limited to, 5G signals) affect the ion channels of cells, preventing normal cellular function and increasing the risk of a variety of disorders, particularly neurological.
The first part of the comment seems to cover this claim already, at least in relation to 5G rollout being bad, without getting into whether it's even a valid claim or not.
